It's been a week since the SS United States left its Philadelphia pier for the last time after it was sold to a Florida county to become part of an artificial reef.

The ocean liner left Philly last week as preparations begin to turn the vessel into the world's largest artificial reef.

After leaving Philadelphia last week, the SS United States has traveled down the coast and around the Florida Keys and is now headed north in the Gulf of Mexico, the last part of its journey before ...