A natural site located in the municipality of Gibara, in the north of the province of Holguin, which takes its name from a cave with a collapsed roof similar to a large natural pool that allows access to the largest flooded cavern discovered in Cuba.

Its main tourist attraction is the access to the cave itself, by a sinkhole of 30 meters long by 15 wide x 7 deep, with transparent waters and bluish reflection that gives rise to its name.

It has four kilometers of explored galleries, which enjoy acceptance for cave diving, allowing the passage through various speleothems, stalactites, stalagmites, columns and mantles.

The Blue Tank is within the ecological reserve “Caletones” one of the most important in the country, crossed by one of the most important migratory bird corridors in Cuba, with a record of 86 migratory species, nine endemic species, 11 endemic subspecies and 34 resident varieties.