The luxury liner SS United States completed its journey Monday from South Philadelphia to Alabama, where it will undergo preparations before it is sunk in the waters off Florida's Gulf Coast to become an artificial reef.

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

The SS United States completed a major step towards becoming the largest artificial reef in the world as the ship arrived in Mobile, Alabama on Monday, completing an 1,800-nautical mile journey from Philadelphia.