These azure waters were thought to lead to the Mayan Underworld.

The "worst battleship ever built" is enjoying a grand second act, submerged 30 feet in the Gulf of Mexico.

Six miles off the coast of Key West, a former military transport ship is now one of the largest artificial reefs in the world.

Though nicknamed the “Russian Freighter,” this ship was actually sunk off the coast of Pensacola by the U.S. government in a top-secret operation.

The 44,000-ton aircraft carrier was purposely sunk to create an artificial reef teeming with life.

This former factory has been transformed into a technicolor wonderland, where dozens of local artists have collaborated to create a real choose-your-own-adventure experience.