Mysteries of the Abandoned: Hidden America

A monstrous airplane that helped America reach new, historic heights sits decommissioned in Tucson, Ariz.; experts investigate and reveal one of the most important aircraft of the 20th century and its contribution to the Apollo spaceflight program. Further segments of the episode portray the North Wilkesboro Speedway in North Carolina, the Potomac River Defences in Maryland and Virginia, and Fort Hunt in Virginia.

A sprawling military facility dotted with bunkers for miles now stands abandoned in the American heartland of Edgemont, S.D.; experts investigate and uncover a once highly-secure WWII ordnance site designed to store deadly munitions. Further segments of the episode portray the Brushy Mountain State Penitentiary in Tennessee, Wolf House in California, and Pueblo Bonito in New Mexico.

A derelict ghost town shows a curious revitalization along an iconic highway in the Mojave Desert; experts investigate and reveal a once thriving and bustling Route 66 stopover that’s being resurrected into a historic Americana destination. Further segments of the episode portray Murphy Ranch in California, the Belle Isle Zoo in Michigan, and the Charleston Navy Yard and Navy Medical District in South Carolina.

A historic sea vessel rusts in the Delaware River; experts investigate and reveal a passenger liner and the architecture that doubled as a U.S. warship. Further segments of the episode portray the Idlewild vacation resort in Michigan, the Bolinas Transmitting Station in California, and the Cahokia Mounds in Illinois.