The Diefenbunker, officially known as the Central Emergency Government Headquarters, is a massive underground bunker located near Carp, Ontario, Canada. Built during the height of the Cold War in the 1950s and 1960s, this facility was designed to house key government officials and ensure continuity of government operations in the event of a nuclear attack. The bunker extends 75 feet underground and was constructed beneath a natural ridge, with only its metal entrance tunnel, support buildings, antenna farm, and perimeter fence visible above ground.
Today, it serves as the Diefenbunker: Canada's Cold War Museum, offering visitors a unique glimpse into the nation's Cold War history and civil defense preparations.