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Explore the Rio Secreto Nature Reserve outside of Cancun on this full-day excursion, where you'll swim and wade in one of the most spectacular underground caves in Mexico. See the famous crystal caves on a tour that showcases the spectacular natural wonders of the Yucatán. Choose round-trip transportation from your Cancun hotel, or meet your guide at Rio Secreto directly.


  • Rio Secreto Nature Reserve
  • Swim through an underground river and enjoy the tranquility inside an ancient cave
  • See gorgeous crystal-like cave formations above the turquoise water
  • Hotel pickup and drop-off from most Cancun and Playa Mujeres hotels (if option selected)

Recent Photos of This Tour

What You Can Expect

Rio Secreto Underground River Tour with Crystal Caves

Visit Rio Secreto Naure Reserve

Choose pickup at your Cancun hotel or meet directly at Rio Secreto Nature Preserve.

Arrive at Rio Secreto and listen as your guide reviews safety considerations and hands out equipment, including a hard hat with a lamp, a wetsuit, a life vest and water shoes.

Follow your guide into the underground cave to view the breathtaking crystal formations on both the ceiling and and the floor. Walk along a path through the caves and wade or swim through the river itself. Enjoy the sound of your group's movement through the subterranean cavern echoing off the walls. View the vibrant colors and dramatic mineral forms that lie hidden deep below the surface of the earth.

Exit the cave and opt for a shower at the Rio Secreto's facility. Swing in a hammock and relax in the Nature Preserve before boarding your bus for the return trip. End your Rio Secreto adventure with drop-off at your hotel in Cancun or at the Plaza Kukulkan.

Customer Reviews

Jennifer P

5 star rating: Highly Recommended February 2017

This was a true adventure, perfect for my teenage sons and myself. The underground caves and crystal water felt absolutely other-worldly!

Yui Yi C

5 star rating: Highly Recommended February 2017

Amazing underground tour. Got to swim and walk in the clear water. It and #39;s useful to borrow their walking stick as my cousin was using it to mark where the rocks are. No artificial lights; very peaceful.

Joyce B

5 star rating: Highly Recommended January 2017

This tour was a little pricey but worth the money in the end. I didn't like how we had to pay extra to get picked up from our hotel Royalton. Pictures also cost 100 which was the most expensive out of the excursions on this trip.

Money aside-- the caves were amazing. Our guide, Ricardo, was fairly new but extremely knowledgeable. Walking in the river was difficult for me, but not impossible. I am very clumsy by nature. Once the tour was over we got to try a shot of a locally produced liquor and then on to a buffet with amazing food. Beware the sauces!

Jacqueline C

5 star rating: Highly Recommended January 2017

Fabulous tour. Well organised. A unique experience.
We stayed in Cancun and I was travelling with a fit 70 year old and a 9 year old. We were on a large coach however it arrived on time. We were taken to the reception area where we used the toilets. We were divide into smaller groups 10 in each group and put on mini buses to be taken to the amenities building. We were given wetsuits, cave shoes, life jackets, helmets with a light, walking sticks .There were change rooms and there were lockers for your belongings. You will need to bring swimming costumes to wear under the wetsuits. The guide was multilingual and exceptional. Safety was a priority. The information provided was excellent. It helps if you can swim but if unable you were still able to do the tour. You had to be brave. It is a little scary when you swim however amazing. There are no scary animals! There are tiny fish I was lucky to see one and even tinier crustaceans less than the size of a pin head. I found the water cold not freezing but I am tiny and have no fat. My mother loved it. She found this the best part. She was completely refreshed.My daughter stayed up the front with the guide and one time piggy backed her. She was a trooper. After coming out of the cave there was time to get changed and they served a buffet lunch. There was soup, chicken, rice , beans, cactus and fruit. It was simple but very tasty and by this time we were hungry. We were taken back by mini buses to the main coach. Half way back there was a major protest blocking the roads into Cancun, so the company divided us into smaller groups and put us on mini vans so we could return to our hotel more quickly.Really sensible. It was great day and different experience. The caves themselves are not that beautiful unlike Jenolan caves in NSW but the experience and information was exceptional. Jackie from Sydney.

Patrick L

5 star rating: Highly Recommended January 2017

We were on our Honeymoon. The trip there from the hotel was very good. The experience at the site was wonderful. My wife and I like both water sports and caves. This was a combination of both which you will not find anywhere else. With the transportation and the experience all paid for ahead of time, there was no pressure or schedules to meet. It was all provided. This made the experience more relaxing and more enjoyable. This cave experience is something that everyone should experience.

Izak K

5 star rating: Highly Recommended January 2017

The Tour is phenomenal and very interesting the guide is knowledgeable and on top of things. The only negative I have to say is we had a lazy bad photographer. In a place where they dont let you bring your own camera and charge a lot of money for pictures I would expect as a minimum a good photographer. Next time I will go I will insist on getting a good active photographer that stays with the group and does not disappear like our did.

Tong Z

5 star rating: Highly Recommended January 2017

It was a wonderful experience. Some comments:

1. Although the tour accepts children greater than 4 yrs, I would not recommend any kid younger than 10 yrs to go there. It was really challenging and risky for them.
2. Hotel pickup/dropoff is not necessary at all. The taxi rate from most hotels won't exceed 600 pesos for the round trip. If you can find someone in the hotel to share the taxi, it will be much cheaper than booking the hotel pickup here. Also, when you are already there, some shuttle would offer you a ride to the hotel at an even lower rate.

Marie B

5 star rating: Highly Recommended December 2016

This is a well run excursion. Our guide, Alfredo, was fantastic and so excited about his job. You float in the crystal clear water with lifejackets, helmets with lights and wetsuits. I would advise wetsuits as the water is about 77 degrees and it does get cold after a while in the water. The food was a hot buffet and was typical Mexican food - which I love. Rice, beans, salad, pork or chicken in green sauce, fruits... a very nice presentation. You are not allowed to bring your camera on this excursion and the photos are expensive - 119 for full photos with choice of 3 souvenirs, 89 for full CD and 25 for each single photo. However, if you were taking your own photos you may have missed the experience. This tour is very professional and very enjoyable. My fiancee enjoyed this experience most of our week in Cancun.

Mark T

5 star rating: Highly Recommended December 2016

This tour was amazing! We had taken it in December of 2015 and were so enamored with it we brought back our entire family to enjoy this incredible experience. The only difficulty we had was contacting the tour agency to establish a pickup time.


5 star rating: Highly Recommended October 2016

unbelievable experience.

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