Mexico - Ring of cenotes of Chicxulub Crater, Yucatan

"The Chicxulub Impact Crater, is a geomorphological formation dating from the end of the Mesozoic era, specifically by the end of the Cretaceous at the limits with the Terciary, that was produced by the impact of a meteorite.

This belt is lying on the south margins of the borders of the impact crater, having its semicircular shape a radial distance of 90 km (180 km of diameter; which is the approximately distance from Celestun to Dzilam de Bravo), extending the crater itself its margins into the continental sea, at the same distance north.

As a result of the impáct, the Ring of Cenotes, took shape, making together with the results in the geomorphology of the north of Yucatan, from the impact crater, the foundation for the functioning of the geohydrologic features of the peninsula of Yucatán. It is a unique event that left its mark within the karstic wide variety of limestone karstic process and formations, the water body, the flora and the fauna, the natural elements of the formations, and a complete geohydrologic manifestation of the stages of the sink holes known as cenotes. More than 900 cenotes formations only 99 of them may be proposed for inscription."

Source: UNESCO World Heritage Tentative List

Thanks to Martha of Mexico.