Whether they were sunk specifically to create an artificial reef for divers, or for an accident, wrecks are fascinating windows into the past. Ships, airplanes and even cars are exciting to explore and usually full of aquatic life. Each wreck offers a chance for a discovery, to unravel a mystery or to discover something that others have left out. The PADI Wreck Diver specialty course is popular because it offers exciting adventures while following responsible wreck diving procedures.