The S.S. United States, the largest passenger ship ever built in America, left Philadelphia under tow on Wednesday, eventually to be sunk off the Gulf Coast.

The historic, aging ocean liner that a Florida county plans to turn into the world’s largest artificial reef has departed from south Philadelphia’s Delaware River waterfront

The SS United States is headed out to sea. The legendary and iconic ocean liner, once considered a marvel of American shipbuilding, has departed for one final voyage before being converted into an artificial reef in the Gulf of America,