Homestead Crater

A 55-foot-tall beehive-shaped limestone dome in Midway enclosing a geothermal spring naturally heated to 90-96 F year-round, making it the only warm scuba destination in the continental US interior. Divers enter through a tunnel cut into the rock and descend from a deck to platforms in the hourglass-shaped shaft, with mounted lights at roughly 20 and 40 feet. The hole is about 65 feet deep but divers are asked to stay above 45 feet to avoid stirring the silt bottom. It is a privately operated, reservation-only facility at the Homestead resort.