Artificial Reef

The world's largest artificial reef was created by the purposeful sinking of the aircraft carrier USS Oriskany off the coast of Pensacola, Florida, in 2006.
• USNS Hoyt S. Vandenberg
The second-largest artificial reef will be the USNS Hoyt S. Vandenberg, a former World War II era troop transport that served as a spacecraft tracking ship after the war. The Vandenberg was scuttled seven miles off Key West on May 27, 2009, in 140 feet of clear water. Supporters expect the ship to draw recreational divers away from natural reefs, allowing those reefs to recover from the damage caused by overuse.