Walk and swim through an underground limestone river near Playa del Carmen, where crystal formations and guided routes reveal the Yucatán’s hidden cavern world. Includes transport, equipment, and a buffet.
More ways to explore the area's outdoor wonders
You step off the air-conditioned van and the jungle leans forward — hot, green, and expectant. A staff member hands you a helmet and a flashlight, and the trees seem to hush as you descend into a passage where light no longer rules. The underground river at Río Secreto guides you through low galleries and vaulted caverns, its cool water daring you to wade, swim briefly, and move quietly so the fragile stalactites and flowstone remain intact.
Difficulty
moderate
Duration
4 hours
Fitness Level
Moderate fitness required—able to walk on uneven, wet rock and swim short distances while wearing a life vest.
Wildlife
History
Cavern systems on the Yucatán Platform were significant in Maya cosmology as entrances to Xibalbá; many cenotes supplied freshwater to ancient settlements.
Conservation
Río Secreto operates as a managed reserve with guided routes and limits to protect delicate speleothems; follow rules to minimize impact and avoid touching formations.
Reserve your spot on the Discover a secret river in middle of the Jungle. Buffet included. today and enjoy a trusted, highly rated experience designed to help you make the most of your adventure.
Bring water shoes
Traction and toe protection are essential—you’ll walk on slick limestone and swim short stretches.
Use the provided lights only
Avoid touching formations or using external lights that can damage formations or disorient the group.
Hydrate before you go
It’s humid at the entry and cooler underground—drink water pre-tour and carry any medications in a dry bag.
Plan for a change of clothes
You’ll leave damp and often cooler; the site provides lockers and dressing rooms.
Water shoes or sturdy sandals
Protects feet on slippery limestone and during shallow swims.
Quick-dry clothing
Dries fast after wading and keeps you comfortable in humid conditions.
Small dry bag
Keeps phone, ID, and medications dry during the cave portion.
Light jacket or long-sleeve shirt
Useful after the cave when temperatures drop, especially in winter mornings.
winter