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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. Experience the serenity of the famous crystal caves of mexico, a tour that showcases the spectacular natural wonders of the Yucatán. Choose round-trip transportation from your Cancun hotel, or meet your guide a central Cancun location.


  • 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 at Plaza Kukulkan for your afternoon trip to 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


5 star rating: Highly Recommended October 2016

just awesome a must do

Judy R

5 star rating: Highly Recommended October 2016

As I am a senior, the guide gave me special attention. As a result, the tour was possible for me. I would highly recommend the tour.

Keith K

5 star rating: Highly Recommended October 2016

One of the most memorable tours in my life. You swim with a life jacket and wade though about a mile of underground cave between stalactite and stalagmites. It is eerie and beautiful, a once in a lifetime type of tour. Leo was our guide and was great. Everything except the overpriced photo disc 75 was great about this tour. You can't bring you own camera. Do this tour.

Michael H

5 star rating: Highly Recommended September 2016

The tour in the underground caves was amazing. You had to be steady on your feet due to the rugged terrain in the water. I really enjoyed when we swam in the deeper water. The tour guide was courteous and very informative.

Dinaz G

5 star rating: Highly Recommended September 2016

This is a must-see for all nature lovers. We booked this tour through Viator.


5 star rating: Highly Recommended August 2016

Our guide, Tomas was excellent. Loved the experience. Prepare to spend 25 for one picture or 89 for all your pictures, since you are not allowed to bring your own camera on the adventure.

Kathleen B

5 star rating: Highly Recommended August 2016

fantastic tour, would recommend to any one of any age. We were in a small group with an English speaking guide who was very knowledgeable and answered lots of questions. The caves are amazing and the food afterwards was really nice and tasty.

steven m

5 star rating: Highly Recommended August 2016

This was well worth the money and time. Just an amazing guide and place. Always felt safe. The lunch and travel we great.

Pernille T

5 star rating: Highly Recommended June 2016

Amazing to walk and swim through the cave. The guide had a lot of knowledge about the place and was ready to share as much as we wanted with us. Good to see that they were talking very good care of the sight and of the visitors.

Christina United States of ... 

5 star rating: Highly Recommended June 2016

This was an amazing tour and well worth the money. The tour guide Vickie spent extra time with my 70yr old mom and made sure she was having a great time. AWESOME!!!

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