Cenotes Dos Ojos are probably the world's best known cavern dives. The name Dos Ojos means two eyes and refers to two neighboring cenotes which connect into a very large cavern zone shared between the two. These two cenotes appear like two large eyes into the underground. The original cave diving exploration of the whole cave system began through these cenotes back in the late 1980s.

The two dives start and end at the same place but are completely different from each other.

The first dive, called THE BARBIE LINE, on its 500 meters (1,600 feet) circuit, leads the diver mainly along the opening of the second eye, containing plenty of daylight. It also gives divers a lot of space to swim around huge columns and stalactites.

The second dive, called THE BAT CAVE LINE, feels almost like a cave. It is the darker of the two dives as it leads around an air-filled dome with little daylight entering. We ascend here to see the stunning decorations and the bats living in the air dome.

Movies like the 2001 IMAX film "Journey into Amazing Caves" and parts of the Hollywood 2005 movie "The Cave" were filmed in Dos Ojos.

The Dos Ojos underwater cave system was connected with the Sac Actun underwater cave system in January 2018 and now is part of the longest underwater river system in the world with 369 km / 229 miles of explored lines.