Charleston Harbor has a long and storied history playing a key role in the start of the Civil War. The first shots of the Civil War were fired at a Federal ship entering Charleston Harbor. Home to the now recovered Confederate submarine the H.L Hunley as well as many other shipwrecks, much is concealed beneath the surface of this body of water. Today the harbor acts as a major passenger cruise and shipping port. Part of the Intercoastal Waterway, the Charleston Harbor is a gateway to the Atlantic Ocean.