Chichén Itzá Reborn: Discover the Maya Wonder’s New Face In the heart of the Yucatán Peninsula, after years of Tren Maya construction, …
TOURS FROM VALLADOLID
DISCOVER THE MAGIC OF THE MAYAN WORLD
Cultural Commitment
Responsible tourism to preserve and celebrate the Mayan heritage.
Expert Local Guides
Certified guides passionate about Mayan culture.
Authentic Experience
Customized tours to iconic locations and Mayan villages.
BOOK YOUR EXPERIENCE
WITH ONE OF OUR GUIDES
AT LAKINTOURS.COM

When you book directly with our LakinTours agents, you get special rates, personalized attention and greater flexibility.
Outstanding benefits:
– Preferential rates when booking direct
– Close and personalized attention
– Greater flexibility for changes or adjustments
– Direct communication with our local team
A Whatsapp window will open so you can communicate directly with one of our agents.
you can also find us at:

EXPLORE OUR TOURS IN YUCATÁN
From mystical cenotes to ancient ruins, each tour is a unique experience.
All our experiences start from VALLADOLID, YUCATÁN.
(Except for “Guide Services”)
Click on the image to see more information.
CHICHEN ITZÁ
Guide Service

CHICHEN ITZÁ
Guide Service at the Archaeological Site





Explore the secrets and wonders of Chichen Itza with our expert and native guides. This site, recognized by UNESCO as a World Heritage Site in 1988 and declared one of the New Seven Wonders of the World on July 7, 2007, is a living legacy of the ancient Mayan civilization.
Discover its culture, architecture, history, and traditions through a unique experience designed to fully immerse you in its fascinating past. More than just a guide, you’ll have a dedicated companion to maximize your enjoyment, offering tips and recommendations to make your visit unforgettable.
Want to save time? Skip the long lines by booking your tickets directly when you reserve with us. Make your visit to Chichen Itza a unique, hassle-free experience!
AVAILABLE OPTIONS:
PRIVATE GUIDE or SHARED GUIDE
More Information
⌚ Tour time: 8:00 a.m. (to avoid crowds and heat)
📍 Meeting point: main entrance of the Chichen Itza archaeological site
❌ Tickets to the archaeological site are not included
EK BALAM
Guide Service

EK BALAM
Guide Service at the Archaeological Site






Did you know that the Mayans built a city with a triple wall? Just 30 minutes from Valladolid, Yucatán, lies Ek Balam, which in Mayan means “black jaguar” or “jaguar star.”
Embark on a fascinating tour of this ancient city and uncover its secrets as you explore its rooms and observe the authentic hieroglyphic writing that still adorns its walls. Unlike other archaeological sites, Ek Balam allows you to enjoy the landscape from the top of its majestic palaces and temples, including the impressive Gran Acropolis, one of the most stunning structures in Yucatán.
Ek Balam will surprise you with one of the most important tombs in the Mayan world, and during your visit, you’ll learn about the history, architecture, and culture of this enigmatic civilization. If you’re in the area, this experience is a must.
Don’t miss the opportunity to visit Ek Balam, a unique archaeological site with secret corners that only a native guide can reveal to you. Get ready to climb its temples and uncover the history hidden in its walls. We guarantee you’ll fall even more in love with Mayan culture!
More Information
⌚ Tour time: 8:00 a.m. (to avoid crowds and heat)
📍 Meeting point: Main entrance of the Ek Balam archaeological site, right where the photographic letters are located.
❌ Tickets to the archaeological site are not included
ITZÁ
EXPERIENCE

ITZÁ EXPERIENCE
CHICHEN ITZA, REGIONAL FOOD and 3 CENOTES ( ikkil, xkeken y samula)








Embark on an adventure from Valladolid and discover the majestic pre-Hispanic city of Chichén Itzá, declared a World Heritage Site in 1988!
Our tour begins with the convenience of picking you up directly from your accommodation. Being one of the first to arrive at the archaeological site, you’ll be able to enjoy the tranquility of the place, avoiding the heat and crowds. There, a certified guide, an expert in the history of Chichén Itzá, will reveal the secrets and wonders of Mayan culture.
After exploring this sacred site, the adventure continues with a visit to one of the most impressive cenotes in the region, Cenote Ikkil. Once you’ve refreshed, it’s important to recharge your energy, which is why this experience includes lunch at a local and traditional restaurant with a wide variety of delicious dishes.
To complete the adventure, we’ll head to other natural sources of crystal-clear waters located in the heart of the lush Yucatecan jungle, featuring stunning vaults and natural rock formations—X’Kekén and Samulá cenotes, each with its own unique charm and beauty.
This exclusive tour, with small groups, allows you to enjoy the experience without hurry and at your own pace. Get ready for a complete immersion in the history, nature, and culture of Yucatán!
More Information
Pick up: 7:00 a.m. in Valladolid, Yucatán.
Includes:
- Transportation
- Driver
- Fuel
- Parking
- Guide service at the Chichén Itzá archaeological site
- Traditional meal
❌ Tickets to the archaeological site are not included.
❌ Tickets to the cenotes are not included.
❌ Beverages at the restaurant are not included.
Cenote Restrictions:
- Not suitable for people with mobility issues, heart conditions, or claustrophobia.
- Wheelchairs
- Pets
NOTE: Tour subject to changes without prior notice.
BALAM
EXPERIENCE

BALAM EXPERIENCE
EK BALAM, XCANCHE CENOTE , HUBIKU CENOTE and REGIONAL FOOD







Did you know there is a city that the Mayans protected with a triple wall? Just 30 minutes from Valladolid, Yucatán, lies Ek Balam, which in Mayan language means “black jaguar,” “dark jaguar,” or “jaguar star.”
Discover the ancient magic of this pre-Hispanic city on an unforgettable tour from Valladolid. Explore its mysterious rooms and marvel at the authentic hieroglyphic writing that still adorns its walls. Unlike other archaeological sites, Ek Balam offers you the chance to admire an impressive landscape from the top of its majestic palaces and temples, including the Gran Acropolis, one of the largest structures in Yucatán.
Ek Balam will surprise you at every turn, including one of the most important and astonishing tombs of the Mayan world. During the tour, you will learn about the history, architecture, culture, and much more. If you’re in the region, this is an experience you can’t miss.
To complete your adventure, after exploring the archaeological site, refresh yourself in the crystal-clear waters of the Xcanché and Hubikú cenotes. The first is located right next to the archaeological site, and both offer the perfect place to relax. End your day with a delicious buffet of regional food. An unforgettable experience awaits you at Ek Balam!
More Information
Pick up: 7:30 a.m. from VALLADOLID, YUCATÁN.
Includes:
- Transportation
- Driver
- Fuel
- Parking
- Guide service at the Ek Balam archaeological site
- Tickets to Xcanché and Hubikú Cenotes
❌ Tickets to the Ek Balam archaeological site are not included.
❌ Beverages at the restaurant are not included.
Cenote Restrictions:
- Not suitable for people with mobility issues, heart conditions, or claustrophobia.
- Wheelchairs
- Pets
NOTE: Tour subject to changes without prior notice.
XIBALBA
EXPERIENCE

XIBALBA EXPERIENCE
Cenote Tour: Sac Aua, Palomitas, Secreto Maya, Xux Ha and Regional Food






For the ancient Mayans, the universe was composed of three levels and seven cosmic directions: the cardinal points, the upper world, the earthly world, and the underworld.
The most feared place was Xibalbá, where the nine dark lords dwelled. Only the bravest and most privileged could descend and be in contact with them.
In this adventure, you will have the opportunity to explore the gates to the underworld, known as ts’ono’oto’ob, mysterious places that were possibly used for offerings to Bolonti’ Ku’, the nine lords of Xibalbá.
Our Xibalbá experience is an exclusive tour designed for small groups of a maximum of 6 people. Together, we will discover some of the most impressive cenotes in the region, enjoying the experience without rush and at your own pace.
Discover the magic of the cenotes and the Mayan culture in an unforgettable tour.
Explore four spectacular cenotes: from the crystal-clear waters of the Sac Aua cenote to the majestic cave of Xux-ha, each one tells an ancient story that will connect you to the past.
The experience culminates with a delicious banquet of Yucatecan cuisine: the traditional poc chuc, prepared in a Mayan community. If you need vegetarian or vegan options, please be sure to inform us when making your reservation.
NOTE: food is subject to availability or changes without prior notice.
Live an unforgettable adventure full of history, nature, and culture!
More Information
Includes:
- Transportation from your hotel in VALLADOLID, YUCATÁN.
- Driver
- Fuel
- Tickets to four cenotes (Sac Aua, Palomitas, Secreto Maya, and Xux Ha)
- Regional food
- Water during transportation and at the cenotes
❌ Does not include Life Jackets or Lockers.
❌ Does not include drinks at the restaurant.
Cenote Restrictions:
- Not suitable for people with mobility issues, heart problems, or claustrophobia.
- Wheelchairs
- Pets
NOTE: Tour is subject to changes without prior notice.
FLAMINGOS
EXPERIENCE

FLAMINGOS EXPERIENCE
RIO LAGARTOS, COLORADAS, CENOTE and REGIONAL FOOD







Your adventure begins early at 6:00 a.m. when we pick you up from your hotel in Valladolid.
The journey to the Río Lagartos port will take approximately 2 hours, but the wait will be worth it.
Once in Río Lagartos, you’ll board a boat for an exciting journey through mangroves and estuaries. During the tour, an expert guide will accompany you, offering you the opportunity to closely observe a variety of migratory birds and local wildlife, including the fascinating crocodiles that inhabit the region.
After the boat ride, we will visit the iconic pink lagoons of Las Coloradas, where you’ll be able to marvel at the vibrant color of the waters, caused by the high concentration of salt and unique microorganisms. This place is perfect for taking stunning photos and connecting with nature.
On the way back, we’ll make a final stop at an impressive cenote. Here, you can refresh yourself in the crystal-clear waters and marvel at the natural rock formations. Additionally, you’ll enjoy a delicious buffet lunch featuring authentic Yucatecan flavors.
Finally, we will take you back to your hotel in Valladolid, ending a day filled with adventure, nature, and unique experiences.
More Information
Includes:
- Pick up and drop off at your hotel in VALLADOLID, YUCATÁN.
- Driver
- Fuel
- Boat ride in Río Lagartos for wildlife and flora observation
- Time to swim at the beach
- Tickets for access to Las Coloradas
- Tickets for access to the cenote
- Buffet lunch
Does not include:
❌ Life jackets and lockers
❌ Drinks at the restaurant
Cenote Restrictions:
- Not suitable for people with mobility issues, heart conditions, or claustrophobia
- Wheelchairs
- Pets
Note: Tour subject to changes without prior notice.
MAYAN WORLD
EXPERIENCE

MAYAN WORLD EXPERIENCE
CHICHEN ITZA, CENOTE, BUFFET Y EK BALAM






Join us on an unforgettable adventure to explore two of Yucatán’s most iconic treasures. Make the most of your stay in Valladolid!
If you’re a lover of archaeology, history, and, of course, adventure, this experience is tailor-made for you. Start your day at the Chichén Itzá archaeological site, enjoying its majesty before the crowds arrive and the typical heat of the state intensifies.
Next, relax and refresh yourself in the crystal-clear waters of one of Yucatán’s most beautiful cenotes, and savor a delicious buffet of regional food. To end the day, watch the sunset from Ek Balam, taking in breathtaking views of its temples and palaces in a unique setting.
Our certified guides will immerse you in the history and knowledge of the Maya culture and its amazing pre-Hispanic cities. Enjoy this experience at your own pace, in an exclusive tour with small groups.
For us, your satisfaction and enjoyment are our top priorities. Come and experience Yucatán like never before!
More Information
Pick up: 7:00 a.m. from VALLADOLID, YUCATÁN.
Includes:
- Transportation
- Driver
- Fuel
- Parking
- Guided tour in the Chichen Itza archaeological site
- Guided tour in the Ek Balam archaeological site
- Entrance tickets to the Cenote
- Buffet-style meal
❌ Does not include entrance tickets to the Chichen Itza and Ek Balam archaeological sites
❌ Does not include drinks at the restaurant
Cenote Restrictions:
- Not suitable for individuals with mobility issues, heart conditions, or claustrophobia
- Wheelchairs
- Pets
NOTE: Tour subject to changes without prior notice.
WALKING TOUR
VALLADOLID

WALKING TOUR VALLADOLID






Discover the charming city of Valladolid on a walking tour that will take you through its streets full of history, culture, and tradition. From the historic heart of the Main Square to the imposing colonial architecture that characterizes this magical town, immerse yourself in everyday life, ancient stories, and the best-kept secrets of Valladolid. You will visit the most emblematic corners of the city and enjoy the hospitality of its people, all in a tour designed to show you the best of this Yucatecan gem.
You have 2 time slots to choose from: Morning Shift or Afternoon Shift.
MORNING SHIFT
Schedule: 9:30 a.m.
Description: This tour begins at the Main Square, near the Mestiza Fountain, and takes you on a journey to discover the history and culture of Valladolid early in the day. You will start at the majestic Church of San Servacio and explore the picturesque indigenous neighborhood of Santa Ana, with its vibrant market and local atmosphere. You will also visit the impressive Cenote Zací, a natural treasure located right in the center of the city.
Meeting Point: Francisco Cantón Rosado Main Square (near the Mestiza Fountain; look for the guides with umbrellas or orange t-shirts).
NOTE: Tour subject to changes without prior notice.
AFTERNOON SHIFT
Schedule: 5:30 p.m. – 7:30 p.m.
Description: This tour also begins at the Main Square, but takes you along a path full of mystery and evening charm. You will stroll through the picturesque cobblestone streets and be amazed by the colorful facades leading you to the imposing Exconvento de San Bernardino, where you will explore one of the most popular museums in the city. The tour culminates at the Exmonastery of San Bernardino just before the light show, an unforgettable experience to end the day.
Meeting Point: Francisco Cantón Rosado Main Square (near the Mestiza Fountain; look for the guides with umbrellas or orange t-shirts).
NOTE: Tour subject to changes without prior notice.
WHAT OUR CLIENTS SAY
WE SHARE WITH YOU THE REVIEWS OF THE PEOPLE WHO HAVE BEEN ENCOURAGED TO ENJOY WITH US OUR TOURS IN YUCATAN.
EXCELENTE A base de 106 reseñas socouvrette2025-05-29Verificada Gran excursión de día completo a Chichén Itzá + Ek' Balam Tuvimos un tour absolutamente genial a Chichén Itzá, Cenote Hubiku y Ek' Balam. Nos recogieron exactamente a tiempo en una bonita camioneta con aire acondicionado y estuvimos en Chichén Itzá 20 minutos antes de que abriera y nuestro guía tenía nuestros boletos listos (aviso es más rápido si les dejas comprar tus boletos y pagarlos en efectivo, sin esperar cola para pagar con tarjeta cuando llegues allí, sin cargo). El guía, Enrique, fue fantástico. Hemos hecho muchas giras este viaje y él era uno de los mejores, y muy bien informado. Con el tiempo que entramos, llegamos al Castillo mientras la plaza estaba casi vacía, ideal para fotos. El resto del recorrido fue súper informativo y nos alegramos de tener 40 minutos de tiempo libre para caminar hasta el cenote. Luego condujimos al Cenote Hubiku que estaba terriblemente vacío. Al comer primero, evitamos el único autobús turístico que estaba allí porque cuando estábamos terminando de comer, estaban saliendo del cenote, así que tuvimos el cenote para nosotros solos durante una hora! La comida también estaba bien. No es la peor comida de gira que hemos tenido. Finalmente, hicimos un viaje rápido a Ek' Balam donde nuestro guía Balthazar también dio un gran recorrido. ¡Qué sitio tan genial del que no sabíamos nada! Subimos a la parte superior del palacio y la vista era fantástica. Ha sido genial aprender sobre la cultura maya antigua y actual. Durante todo el día, nuestro piloto, Sergio, estuvo genial. Atento, siempre esperándonos con agua, y dispuesto a darnos alguna información (en español) mientras conducía. Gran tour! Gracias a todo el equipo. Era fácil organizarse por WhatsApp, eran súper sensibles y siempre listos con la información que necesitábamos. William2025-05-26Verificada Ek Balam 2025 Este es un tour privado por el precio de un tour grupal. Nuestro guía, Manuel, fue excepcional. A+ atención al cliente y comunicación. William2025-05-26Verificada Chichen Itzá 2025 Este es un tour privado por el precio de un tour grupal. Nuestro guía, Enrique, fue excepcional. A+ atención al cliente y comunicación. Amita K2025-05-13Verificada ¡El mejor tour de Chichén Itzá! Mis amigos y yo reservamos este tour privado de Chichén Itzá para las 8 AM. Nos quedamos tan gratamente sorprendidos, y agradecidos, por esta experiencia de tour. He descubierto que los guías turísticos a veces pueden insertar un montón de teatro en los tours para apaciguar a los turistas y estoy TAN feliz de que esta no fue nuestra experiencia. Nos dirigimos al sitio (muy recomendable para evitar las enormes multitudes de autobuses turísticos). Una vez que llegamos, Enrique nos recibió cálidamente y comenzó nuestro recorrido con prontitud. Enrique era fenomenal - factual, honesto y extremadamente bien informado sobre la historia detrás de esta ciudad notable. Uno de los mayores beneficios de un tour privado es que el guía es capaz de ser personal en su interacción con usted, sus preguntas y su tiempo. Mis amigos y yo somos multilingües, pero para aquellos que solo hablan inglés, tengan la seguridad de que Enrique habla inglés con fluidez y sin esfuerzo. Recomendamos encarecidamente reservar este tour con LakinTours y asegúrese de preguntar por Enrique! mostafatifa5202025-05-09Verificada Gran experiencia con Martin Muy buen tour con Martin! Su explicación fue impresionante y muy entretenida, que perdimos la noción del tiempo. Martin utiliza visuales, sonidos y acústica en su gira. Aprendimos mucho sobre las maravillas del chichén y la civilización maya. Es absolutamente uno de los mejores tours que hemos tenido. También le pedimos a Martín que nos comprara los boletos por adelantado y le pagamos el precio en pesos una vez que llegamos para no tener que hacer cola. NURIT20132025-04-12Verificada The best way to see Chichen Itza I am so glad we booked a guide for our visit to Chichen Itza, and even more so, that Eyder was our guide. On the day before our tour we received detailed information regarding our arrival and everything went very smoothly. We then met Eyder at the gate, just as the site opened, and before the crowds arrived. Eyder planned the tour accordingly.The tour itself was very very interesting. Eyder not just explained what we saw but also provided fascinating details about the archeologists' discovery process. We also appreciated hearing about the Maya culture in the past and in the present. We left Chichen Itza with a lot of new information and a motivation to learn more. Taino19792025-04-11Verificada Conocimiento único de historia Me encanto la experiencia, el guía super amable y gran conocedor de la historia de sus ancestros. Nos brindo conocimiento queba pasado de generación a generación sobre las poblaciones ancestrales. Stay775042025-03-28Verificada Great guide! Warm and inviting We had a great time with Martin. He’s passionate and smart and truly a local!Also appreciated the pace of the tour. Martin has such a great and calm energy. Samantha P2025-02-20Verificada Better than a bus tour! Our guide Eyder is very knowledgeable with a wealth of information in all aspects of the Chichen Itza site and Mayan culture. We thoroughly enjoyed our tour. He gave us a good perspective and challenged our thinking on the symbolism used in the Mayan Culture. He linked every aspect of the tour together very well. His English was good and easy to understand. He always made sure we were in the shade during his teachings. I would go with a private guide again 100%! Worth the value. He prepurchased the tickets for us and we skipped the lines, being one of the first ones into the site! We watched the 100's of people on bus tours and felt sorry for them. Our group of 5 took the Tren Maya from Playa del Carmen to Chichen Itza and spent the whole day in the area. It wasn't much more money than if we took a bus tour and much more relaxing and personal. Would highly recommend the private guided tour!! 👌 CocoandLouis2025-01-10Verificada Mejor tour! Maravillosa experiencia. Henry está muy bien informado sobre el sitio y la historia. Siendo maya y habiendo crecido en la zona, añadió muchas historias geniales de sus abuelos y generaciones.
EXCELENTE A base de 274 reseñas Anemone2025-07-10Verificada We signed up for a private tour which was perfect for us. Eyder was very knowledgeable and could answer all the curious questions that we had. The communication before meeting up was also super in depth and Eyder took care of acquiring the tickets for us which was extremely helpful. He was also very accommodating with what we were most interested in. All in all a great tour and we can 100% recommend getting a guide through this company. It’s more helpful to have someone next to you who can explain what you’re looking at when you go see the Mayan temples. Arturo2025-07-03Verificada My family and I had the pleasure of touring with Henry, a local who grew up exploring these grounds as a child. His family were vendors at the site, and through them, he developed a deep connection to his Mayan heritage and its history. Remarkably, he taught himself English just by listening to tourists over the years. Driven by his passion for the ruins, he became a tour guide—and it truly shows. Henry's knowledge is impressive, and he shared fascinating insights and details that many non-native guides might easily overlook. This was my second time visiting the site, and thanks to Henry, I left with an even deeper appreciation. Honestly, two hours barely scratched the surface if you're someone who really wants to learn. Henry, we’ll definitely look you up next time we’re back. Cheers, my friend! Sofia2025-07-03Verificada I wouldn't have it any other way! Thank you so much to our tour guide Martin who was really great 😃 Mary2025-06-24Verificada What a great tour with Enrique - being of Mayan heritage he brought unique insights to our tour Ramiro2025-05-24Verificada Recorrer esta maravilla con un descendiente de maya lo lleva a otro nivel Shelli2025-05-24Verificada We had a wonderful and insightful tour at Chichen Itza. Our guide has spent time at the site since childhood and knew so much about the history feom his extensive knowledge. We met him early and beat the crowds. He took several pictures of us, and it looks like we are all alone there. I would book with this tour again if we return. Tara2025-05-24Verificada Sehr gute, Informative Tour! Von Anfang an hat alles gut geklappt - von Empfehlungen zur Anreise (sehr hilfreich) hin zum Treffen vor Ort. Das Angebot, dass sie mir die Tickets vor Ort im Vorhinein kaufen, damit wir nicht anstehen müssen habe ich dankend angenommen - das Ganze auch ohne Aufpreis oder sonstiges sondern einfach aus Nettigkeit. Mein Guide (Enrique) hatte ein sehr umfassendes Wissen und hat mir alles mit Begeisterung erzählt - ich habe gemerkt, dass er die Thematik selbst interessant findet und nicht einfach irgendetwas auswendig gelerntes runter rattert - umso mehr Spaß macht es dann auch zuzuhören! Die Tour ging ca. eine Stunde, was bei dem Wetter perfekt war - danach konnte ich noch in Ruhe über das Gelände schlendern und mir den Test anschauen. Ich kann die Tour absolut empfehlen! Quentin2025-05-24Verificada Enrique was a phenomenal tour guide. He was clearly exceptionally knowledgeable and excited to share his culture with us. I appreciated the informative nature of the tour in such a small group. A stellar value that I’d recommend to anyone visiting! Luke2025-04-24Verificada We had a great time exploring Chichen Itza with Francisco, he was very knowledgeable about the history of the site and knew the tips, tricks, and photo spots to make the experience much better than going without a guide. Francisco was very professional and he took great pride in his work and Mayan culture which is exactly what you want from a tour guide! We had to reschedule our original time and lakin tours made it very easy without any hassle. I would recommend both lakin tours and Francisco to anyone considering a visit! Elizabeth2025-04-24Verificada Loved the experience! Very knowledgeable, friendly and was very detailed. Gave great instructions to prepare for the tour. Definitely recommend!Verificado por: TrustindexLa insignia verificada de Trustindex es el símbolo universal de confianza. Solo las mejores empresas pueden obtener la insignia verificada si tienen una puntuación de revisión superior a 4.5, basada en las reseñas de clientes de los últimos 12 meses. Leer más
MEET LAKIN TOURS
We are a team of certified native guides passionate about Mayan culture and history.
Our goal is to create authentic local experiences that connect you with the living culture of Yucatán.
We offer personalized tours that allow you to explore colonial cities, refreshing and mysterious cenotes, and ancient temples, all while learning about the rich history and traditions of the region.

OUR MISSION
We believe in the power of alternative tourism to preserve and celebrate our cultural heritage. Join us for an unforgettable adventure and discover the magic of the Mayan world.

OUR BLOG
Nights of Light at San Bernardino: Experience Valladolid Like Never Before Step into Valladolid’s Plaza Principal as the centuries-old stones of the …
Cenote Zací: Dive into Valladolid’s Blue Heart Right in the historical center of Valladolid lies one of the region’s most accessible and …
Discover Valladolid to the Fullest: Join Our Authentic Walking Tour Imagine strolling through sun-drenched cobblestone streets as a passionate local guide shares …
READY FOR YOUR ADVENTURE?
Contact us to plan your next tour in Yucatán.