Zacatón (El Zacatón sinkhole) is thermal water filled sinkhole belonging to Zacatón system - group of unusual karst features located in Aldama Municipality in the northeastern state of Tamaulipas, Mexico. It is the deepest known water-filled sinkhole in the world with a total depth of 339 metres (1,112 ft).
Lakes, Geographic Extremes
Links: en.wikipedia.org
By: Parabellum