Dos Ojos is part of a flooded cave system located north of Tulum, on the Caribbean coast of the Yucatán Peninsula, in the state of Quintana Roo, Mexico. The name Dos Ojos refers to two neighbouring cenotes that connect into a very large cavern zone shared between the two.

Dos Ojos is an anchialine cave system with connections to naturally intruding marine water and tidal influence in the cenotes. 

The coastal discharge point(s) of this cave system have not yet been humanly explored through to the ocean, although large volumes of groundwater were demonstrated by dye tracing to flow towards Caleta Xel-Ha, a nearby coastal bedrock lagoon.

- Wikipedia