By reservation only, the Diefenbunker: Canada’s Cold War Museum will be opening its blast doors to visitors for free for Doors Open Ottawa on Saturday, June 1, 2024.
Please be advised that due to capacity, if you do not have a reservation, you will not be allowed entry into the Diefenbunker.
Date: Saturday, June 1, 2024 (one day only!)
Cost: FREE! We welcome donations to support our unique museum and national historic site.
The City of Ottawa is proud to present Doors Open Ottawa — a free annual architectural event that celebrates our community’s built heritage. It is the second-largest Doors Open event in Canada, and one of the largest in the world!