Ben's Cave is an ocean hole dive site within Lucayan National Park, about 40 kilometres east of Freeport. A sinkhole drops into a flooded cavern system that connects to miles of underwater passages. The dive begins on the surface — sunlight streams down through the opening into stained, tannic water that transitions to crystal-clear salt water as you descend.
The dive is considered one of the most memorable in the Bahamas: stalactites formed when the caves were above sea level during the last ice age are preserved in the clear salt water. The halocline where fresh and salt water meet creates strange optical distortions. Dives here are run by UNEXSO from Port Lucaya and require Advanced Open Water certification with cavern experience. The dry upper chambers of the cave can be visited on foot from the national park boardwalk.