Cenotes are underwater sinkholes which expose groundwater below. It is estimated that there are more than 6,000 of these natural wonders in Yucatan, although only 2,400 are registered. Many have crystal-blue water and maintain a constant temperature of 25° C (77° F).
Tourists from all over the world visit these magical and unique cenotes for cave diving. The clear rain water gathered in the caverns offers great visibility (150m / 500 feet), which makes the discovery of the most incredible limestone caves very easy.
Some of stalagmites and stalactites in these cenotes formed over 65 million years ago. No wonder the Maya people considered them sacred places and entrances to the underworld.