1. DEVIL’S SLIDE BUNKER
The bunker, on Devil’s Peak in California, was constructed during World War II as a station for triangulation and observation. This was part of a larger group of structures built for similar purposes. When in service, a serviceman used binoculars to keep watch. If they discovered an enemy ship, they would shoot it down. The station became obsolete after the incorporation of longer-range weaponry. The site was completely abandoned in 1949, leaving an empty bunker atop Devil’s Slide.