Reply #15: It's downright creepy. It happens over and over.

[Judi Lynn]

Found some other photos:

1. Devil’s Millhopper Geological State Park is home to this beautiful sinkhole that was formed when an underground cavern collapsed. Many fossils have been found in this sink, including shark teeth, marine shells and the remains of extinct animals. It is these bones that inspired the name “Devil’s Millhopper,” suggesting that the animals entered the sink on their way to meeting the devil.



2. The Great Blue Hole is an underwater sink hole located just off of Belize. It measures 984 feet across and 410 feet deep. Originally a limestone cave, this sinkhole was formed as the ocean level rose, collapsing the roof of the cave. Divers can see many types of tropical fish in this sinkhole, as well as a variety of sharks.



3. Venezuela houses several sinkholes, known as the Sarisarinama holes. These holes are approximately 382 yards wide by 382 yards deep. The origin of these sinkholes is unknown. Each one contains unique plants and animals that have been seen no where else in the world.



More:
http://www.unplugyourbrain.com/amazing-sinkholes/