Underground factory. EERIE images have revealed what is lurking beneath the surface across the UK unbeknownst to the public. The creepy pictures show the abandoned remains of Royal Observer Core (ROC) posts built during the Cold War, WW2-era bunkers and civilian air raid shelters. Other haunting snaps show forgotten factories that were built underneath sections of other factories to hide the production of aircraft and tanks while Victorian-era grottos are also pictured. They were a symbol of affluence. The spooky photographs were captured by an urban explorer known only as The Elusive after they stumbled upon an old ROC post. The Elusive / mediadrumworld.com