Diefenbunker was Canada's main political fall out shelter for the cold war era build just outside of Ottawa Ontario. The bunker was to serve as the first line of defence against the suspected Russian nuclear war in the 70`s. Named the Diefenbunker after John Diefenbaker it was built secretly between 1959 and 61 its 4 stories down and had everything needed to run a democracy during nuclear war. The museum allows tourists all access to every room and every hallway. The bunker is just as it was when it was finished and thankfully has not been used. The bunker is open year round to tourists and is a chapter in canada's history that should never be forgotten.