The Big Flat Shelter in Shenandoah National Park, c. 1940s. This shelter was built by volunteers from the Potomac Appalachian Trail Club in the 1940s and was removed at some point in the 1960s due to the creation of the Loft Mountain Campground in the Park. Records on the exact location of the shelter are hazy at best. Those who have researched the location of the former shelter place it, most likely, at the site of the current amphitheater in the campground facility.