A site of interest of XIBALBA expeditions is known as so called Riviera Maya, that presents a belt of eastern Yucatan peninsula coach, leading from well - known Cancun to the south, nearly to Belize border. The name comes from Mayan civilization, that inhabited this area formerly. Xibalba means underworld in mayan langage. Geographical position, geological and climatic conditions, ancient habitation make this unique area, with extensive cave systems, impassable jungle and still not uncovered history, special.
Local surface is completely flat without surface streams, covered by impassable jungle with cenots. A cenot can be a small lake, partly or completely hiden below a rock outhang or a narrow chimney leading to an underground labyrinth.
The first expedition was realized in 2003, when survey of the Cangrejo cenot was initiated after the first recconnaissance and nearly 1 km of new uderground space was found and mapped.
In 2006 new continuation of the Cangrejo cenote was revealed. Joining with Ich-Kin cenot was successful and then system longer than 6 km originated. In the same year a survey of the Koo´x Baal cenote started. Original length 3,5 km was enlarged to 10 km. In 2007 and 2008