From secluded islands to cities perched along cliffs, abandoned structures, and failed engineering projects can be found in the world's most remote locations; using cutting-edge tech, experts reveal how they were built and why they were abandoned. This two-hour episode uses segments from various past episodes.

Places that were once home to or inspired Hollywood films, world-famous musicians, a sports legion, and war heroes are now run-down, abandoned, and forbidden; experts investigate their mysteries and reveal the astonishing secrets behind ten of the world's most iconic abandoned places.