Black Hole Drop is a sinkhole within Cayo District, Belize. The sinkhole is said to be about 300' deep and approximately 300' in circumference.  You rappel in. It is an image of the entrance to the trunk passage at the bottom of the sinkhole itself. The scale is deceptive. You could easily fit a group of 20 in the top of the boulder at the bottom right of the cave passage. Definately worth a visit to this place. I'll be back.