It’s official, Philadelphia. After years of detailed plans and delays, the long-decaying ship, SS United States, has finally left Pier 82 on the Delaware River. Now, after three decades, it’s on its way to becoming an artificial reef off the coast of Florida.

The SS United States has finally left Philadelphia. Driving the news: The largest ocean liner ever built in the U.S. was towed down the Delaware River on Wednesday, gliding beneath the Walt Whitman Bridge as part of a two-week journey to Mobile,