Sima Humboldt and Sima Martel - Bolivar, Venezuela. 314 and 248 metres deep, ancient quartzite sinkholes located on the top of forested table-top mountains and containing patches of isolated, primeval rainforest on their bottoms.
Dead Sea Sinkholes, Israel There is a town in Israel named Ein Gedi. It a home to many sink holes. There are approximately open sinkholes around the coast. The researchers told that there can be twice as many sinkholes which are not discovered as yet.
A forked tongue of lava scorches a side of the Philippines' Mayon Volcano on December Mayon Volcano's recent eruptions may come as small surprise to area residents, many of whom likely remember the volcano's last eruption.