The SS United States, a historic sea vessel once considered the pinnacle of American engineering, now rusts in the Delaware River at Philadelphia, Pennsylvania. Experts investigate the fastest passenger liner ever constructed and a masterpiece of marine architecture that doubled as a U.S. warship.

Amboy, a derelict ghost town in California, shows a curious revitalization along an iconic highway in the Mojave Desert. Experts investigate and reveal a once thriving and bustling Route 66 stopover being resurrected into a historic Americana destination.

A sprawling military facility dotted with bunkers for miles now stands abandoned in the American heartland of Edgemont, South Dakota. Experts investigate and uncover the Black Hills Ordinance Depot, a once highly-secure WWII ordnance site designed to store deadly munitions.

A monstrous airplane that helped America reach new, historic heights sits decommissioned in Tucson, Ariz. Experts investigate and reveal the Super Guppy, one of the most important aircraft of the 20th century with its contribution to the Apollo spaceflight program.

The Abundant Life Building, a curiously designed, windowless building adorned with gold-tinted diamond shapes, now stands derelict in Tulsa, Oklahoma. Experts investigate and uncover the controversial religious figure Oral Roberts and the headquarters behind his pioneering form of American TV evangelism.

An eye-catching collection of graffiti-covered structures that were once the Lake Delores Waterpark, a pioneering entertainment attraction now standing derelict in California's Mojave Desert. Experts investigate and reveal the revolutionary remnants of America's first waterpark.