What are cenotes in Mexico?
The region’s network of cenotes – limestone sinkholes, generally filled with fresh water – was vital for the Mayan civilization that dominated the Yucatán Peninsula before the arrival of the Spanish conquistadors in the 1500s. And it is easy to see why they were considered sacred gateways to the Mayan underworld, known as Xibalba (“the place of fear”).
Many of the other cenotes in the region hold even older treasures: in recent years divers have discovered human skeletons that date back nearly 14,000 years, and even the remains of a mastodon (a prehistoric pachyderm).
Yet the cenotes, which collectively form vast cave systems, have an even greater significance, being linked to one of the most significant events in the history of the earth.
Some 66 million years ago the Chicxulub asteroid struck the Yucatán, a disaster that is considered to have contributed to the extinction of the dinosaurs. The strike also caused large sections of the region’s limestone bedrock to collapse, in turn forming thousands of cenotes.
The Mayans later founded their villages and towns around these flooded subterranean chambers, which, given the lack of lakes and rivers in the region, were vital sources of fresh water.
Today many of these cenotes – known collectively as the “Ring of Cenotes” – have been turned into major tourist attractions, for example, at the Xel-Há theme park near Tulum. But others are far less developed, with little in the way of facilities and few visitors.
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