The Numby Numby sinkhole is located in Australia’s Northern Territory and is surrounded by high cliffs. An underground hot spring feeds into the pit, keeping the water a steady 90 degrees Fahrenheit. The water reaches a depth of about 200 feet almost immediately, and the sinkhole’s shallow waters along its edge are occupied by large lilypads.

 

The Australian Aborigines believed that Numby Numby was home to evil spirits.