A unique piece of Cold War history, the REGAN Vest bunker is a nuclear attack-proof fortress located in Denmark. This top-secret atomic bunker was built to withstand a nuclear attack and served as a critical component of Denmark's defense strategy during the Cold War. It was part of the 24-hour military surveillance of Danish air and sea traffic, conducted by NATO to monitor the Soviet Union and Warsaw Pact members.
Today, it has been transformed into an astonishing subterranean museum, offering visitors a glimpse into the paranoia and preparedness of the Cold War era.