In areas with limestone bedrock, occasionally a deep sinkhole appears to expose the groundwater beneath. This occurrence is often found in Mexico, specifically in the Yucatan Peninsula. Underground river systems flow beneath the entire area and formed massive cave systems. Some of these collapsed, leaving exposed access points in the form of sinkholes, or “cenotes” Like the iceberg, what lies beneath can be even more impressive than merely locating a source of water. Cenotes serve to connect surface water to large underground pools; some small and sheltered by an overhang or cave; others are many feet in diameter such as those at Chichen Itza. The big ones attract cave divers from around the world to explore and measure the large cave systems that lie flooded underground. Divers with underwater lights and cameras have explored some of these systems for dozens of miles. At Power Places Tours , they pack more than 30 years of travel experience together. The considerat
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