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2023 Doors Open Ottawa at the Diefenbunker

June 3, 2023, 10:00 am3:00 pm

Doors Open Ottawa 2023

Tickets for Doors Open Ottawa 2023 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.

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 3, 2023.

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 3, 2023 (one day only!)
Time: 10:00 a.m. – 3:00 p.m. Timed entry every 20 minutes, with the last entry time at 2:00 p.m.
Cost: FREE! We welcome donations to support our unique museum and national historic site.

– Tickets must be reserved in advance. Due to capacity, no walk-up visitors will be allowed entry.
– There will be no guided tours available; only self-guided exploration of the museum.
– Our free nine-language Audio Guide can be accessed on your own device using the museum’s Wi-Fi. No Audio Guide devices will be available at the museum.
– We also encourage you to check out the Interpretive Trail outside the museum.


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! Learn more about 2023 Doors Open Ottawa.


June 3, 2023
10:00 am – 3:00 pm
Event Category:


Diefenbunker: Canada’s Cold War Museum
3929 Carp Road
Ottawa, Ontario K0A 1L0 Canada
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