Exploring a top-secret relic that could have changed the Cold War, a ghost town that was once a dangerous industrial hellscape, a wooden road, and a giant warship at the bottom of the ocean. Stories: 1) H.A.R.P. Super Gun, Yuma, Arizona; 2) Hashima Island Coal Mine, Japan; 3) Plank Road, California, USA; 4) Half Moon Bay, Victoria, Australia.
