The SS United States, once America's crowning jewel of maritime engineering, has begun its last voyage from Philadelphia to become the world's largest artificial reef off the Florida coast. This marks the end of an era for the iconic vessel that has been a fixture on the Delaware River for nearly three decades.

The SS United States, once the largest passenger ship built entirely in the US, has been towed from Philadelphia after nearly 30 years. Launched in 1951, the ship was a symbol of luxury and innovation, carrying nearly a million passengers before its retirement in 1969.

New York City preservationists’ dream of docking an historic ocean liner on the Brooklyn waterfront appears all but sunk — but they’re making a last-ditch appeal to President Donald Trump to make the ship great again.

The ship will join Florida’s 4,300 artificial reefs—human-made places for fish and other marine life to live. How do these reefs work?

The SS United States, the historic ocean liner that spent nearly three decades docked in the Delaware River, reached Alabama on Monday morning to begin final preparations for its sinking. The ship, considered a titan of its time, spent about two weeks being towed 1,800 miles south around the tip of Florida.

A nearly one-thousand-foot-long ocean liner, called the SS United States, sailed past Port Everglades. The massive vessel, which still holds the transatlantic speed record that it set more than 70 years, is heading to the Florida Panhandle.