To kick off the Ottawa Chronicles series, I present to you, our first stop that isn't even in Ottawa!
During the Cold War (aka "YOU'RE a communist. YOU'RE a communist. you're ALL communists!") Prime Minister Diefenbaker signed for this nuclear bunker to be built to prepare for a Soviet attack. Luckily, we never had to put it to use and it has been converted into a Cold War Museum. Since it was built in the 70's, the "artifacts" aren't exactly ancient, but have a charming pastel aesthetic even though it's a bomb shelter.
Cutest bomb shelter I've ever seen.