Río Secreto (Secret River), is an underground river that is unique in its kind. Decorated with stunning stalactites and stalagmites, this unearthly natural wonder has more than 12 kilometers of sunken caves, which were formed over centuries by the river. Río Secreto is mysterious and surreal – you will not soon forget the journey through this underground world.
The chance to actually visit it is quite recent. Before 2007, almost no one had had the chance to enter Río Secreto. Today, visitors are allowed providing they come with a guide and take extreme care of their surroundings.