Blue Hole (Big Pine Key)
The Blue Hole is an attraction on the island of Big Pine Key in the Florida Keys. It is an abandoned rock quarry that was used for nearby road fills and Henry Flagler's Overseas Railroad. The water it contains is mostly fresh and is used by various wildlife in the area, such as birds, snakes, alligators, key deer and green iguanas. It is part of the National Key Deer Refuge.
Blue Hole (Red Sea)
The number of diver deaths in the Blue Hole is not known, one source suggests 130 in the last fifteen years. The majority of those killed were experienced, including highly trained technical divers and diving instructors. There have also been snorkelling deaths at the surface unrelated to the depth of the hole.