Mysteries of the Abandoned: Hidden America (2022)

S1E4 Black Hills Ordinance Depot

In the vast expanse of Edgemont, S.D., a deserted military complex filled with bunkers stretches for miles. Investigators delve into its past, revealing it was once a heavily fortified WWII site meant for storing lethal weapons. The episode also explores other intriguing locations, including the Brushy Mountain State Penitentiary in Tennessee, Wolf House in California, and Pueblo Bonito in New Mexico.