Tickets for Doors Open Ottawa 2023 at the Diefenbunker are now sold out.
Due to capacity, no walk-up visitors will be allowed entry on Saturday, June 3. The museum returns to its regular operations on Sunday, June 4.
We look forward to celebrating Ottawa’s built architectural heritage this weekend!
The Diefenbunker will be participating in Doors Open Ottawa on Saturday, June 3, 2023!
Observed annually as a way to celebrate local history, culture, and architecture, Doors Open Ottawa encourages you to experience the built heritage that surrounds our city.
Join us underground for a day of free admission inside Canada’s most significant Cold War artifact! Tickets must be reserved in advance to secure your entry time.