A subterranean cavity about 20 metres deep has been discovered below the pyramid of Kukulkan at the Mayan site of Chichen Itza in Mexico.
The cavity was discovered using electrical resistance survey and was found to be covered by a layer of natural rock. The Yukatan pennisula has no rivers and very few lakes so cenotes, natural sinkholes that expose ground water, were the only persistent source of drinking water and have long been the principal sources of water in the penninsula.
Some cenotes served an important role in Mayan rites and were believed to function as gateways to the afterlife. Some of the examined cenotes have been found to contain large quantities of valuables and human remains.
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