The SS United States is towed to Alabama and draws onlookers to the East End of Dauphin Island on Monday, March 3, 2025. The historic ocean-liner is being towed to Mobile where it will be prepared for submersion as the world's largest artificial reef off the Florida Gulf Coast near Destin-Fort Walton. John Sharp

After being docked in Philadelphia for nearly three decades, the SS United States -- once the world's fastest ocean liner -- has arrived in Mobile, Al., ahead of schedule to be prepared to be turned into an artificial reef.

The historic, aging ocean liner that a Florida county plans to turn into the world’s largest artificial reef has completed the first leg of its final voyage.