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A portal to the Mayan Underworld. A pool of clear-as-air water. An entrance into some of the world's longest cave systems. A cenote is all of these. If you are planning an adventure vacation to Mexico's Yucatan Peninsula, here's what you need to know.
from: http://ezinearticles.com/?What-Under-the-Earth-Is-a-Yucatan-Cenote?&id=7728018
