Portions taken from www.CaveBiology.com

Atlantis Blue Hole is a massive north/south running faultline system containing one of the largest passages in the Bahamas. The coral rimmed entrance consists of a vertical shaft extending to 40 m depth where a large rift passage begins. This 12 m wide canyon passage has vertical walls extending down to depths of 70 to 85 m. Wreckage of one or more very old boats is located at the bottom of the entrance shaft. According to local lore, the Lusca, a mythical monster, inhabits ocean blue holes and suck down unwary mariners to their doom.