The cave system was discovered by a local landowner in 2004 while tracking an iguana, leading to the revelation of an extensive hidden waterway.
Río Secreto translates to 'Secret River,' a reference to the system's long-term concealment from the public.
The cave contains thousands of stalactites and stalagmites that provide a chronological record of the region's paleoclimatic history.
The water within the cave is part of a complex, interconnected underground aquifer system that spans much of the Yucatan Peninsula.
No biological sunscreen or insect repellent is allowed because chemicals can permanently damage the sensitive cave ecology.
The cave system is roughly 15 kilometers in length, though only specific sections are open to guided tourism.
It is considered one of the most important natural reserves in the state of Quintana Roo due to its pristine condition.
The cave's geological formations are primarily composed of calcium carbonate, which dissolves and reforms over vast timescales.
Río Secreto is a protected nature reserve featuring a subterranean river system formed over millions of years within the Yucatan Peninsula’s limestone bedrock. The site functions as a semi-flooded cave system, allowing visitors to traverse a designated section of crystal-clear underground waters and extensive stalactite and stalagmite formations. Access to the cave is exclusively permitted via guided tours to minimize environmental impact on the delicate geological features. The cavern system remains at a constant temperature year-round due to its subterranean location. No natural light penetrates the deepest sections, necessitating specialized lighting equipment provided by the site. The site is located in a protected ecosystem that acts as a natural aquifer for the region. Visitors engage in a walking and wading tour through shallow water paths that span several kilometers. The reserve maintains strict conservation protocols to preserve the fragile mineral formations that have taken millennia to develop.
The main cavern hall where the ceiling opens slightly to reveal natural mineral formations reflected in the still water.
Bring a change of clothes and a towel, as you will be provided with a wetsuit for the water segments.
Purchase the professional photography package offered by the site, as personal cameras are generally prohibited to protect the cave environment.
Ensure you are comfortable walking on uneven, slippery stone surfaces in low-light conditions.
Do not attempt to bring your own professional camera gear or non-biodegradable hygiene products.
Open daily year-round, weather permitting.
Visitors must wear provided equipment, including life vests and helmets; no touching of stalactites or stalagmites is permitted.
