World's Most Stunning Sinkholes

Sima Humboldt

The largest sinkhole in sandstone, Sima Humboldt is located on the summit of the plateau in Bolivar State, Venezuela. At 314m deep with vertical walls it is very unusual sink hole for several reasons: Its location is on top of the only forested tepui; it’s enormous in size and depth; and it has a patch of forest on its base due to the weathering process that formed the sinkhole.