In Carp, about a half-hour drive west of downtown Ottawa, this four-storey underground museum occupies a former Cold War government shelter. Built between 1959 and 1961, the bunker was intended to protect Canadian officials in a nuclear attack. Explore preserved workspaces and living quarters, then look for the Prime Minister’s suite, War Cabinet room, CBC radio studio and Bank of Canada vault. Guided tours add context, while a free online audio guide lets you explore at your own pace. Reserve a tour ahead and leave time to wander through the exhibits afterwards.
A shelter built for a nuclear emergency
Construction of the bunker began in 1959 and finished in 1961, during the Cold War. Its official name was the Central Emergency Government Headquarters. The Canadian government planned it as a place where key officials could continue working if a nuclear attack made Ottawa unsafe. The site was chosen for its setting outside the capital and its suitability for a protected underground facility.
The nickname Diefenbunker refers to Prime Minister John Diefenbaker, who commissioned the project. The four-storey structure was designed to hold government and military personnel. It remained connected to Canada’s defence infrastructure as Canadian Forces Station Carp until 1994. Today, the former military facility is a museum and a National Historic Site of Canada.
Rooms made for government work
The bunker’s rooms show how officials might have carried out government business underground. The War Cabinet room and map and situation rooms relate to decision-making and military coordination. Cryptographic areas point to the communications work required at the facility. Vintage maps, rotary telephones and early computers preserve details of the technology used in that period.
Other spaces reveal the practical side of life below ground. The Prime Minister’s suite and living quarters were intended for people sheltering in the facility, while the Bank of Canada vault was built to secure the country’s gold reserves. The museum also includes a CBC radio studio. Seeing these different rooms in one place gives a sense of the range of work and daily needs the bunker was designed to accommodate.
Planning your visit
You can explore independently or join a guided tour. The tour provides a route through the underground rooms and adds historical context; after it ends, leave time to continue at your own pace. A free audio guide is available online and can be accessed using the site’s Wi-Fi. One account of a visit found that the guide added detail beyond the exhibit labels, so it can be useful if you want more explanation while exploring solo.
The museum is at 3929 Carp Road in Carp, west of Ottawa. Plan for a substantial visit: exploring the bunker can take two hours or more, especially if you read the displays and use the audio guide. Tour availability is limited, so advance booking is the safer choice if a guided visit matters to you. The temperature varies through the building, so a light extra layer can help. Tours include stairs, though a wheelchair lift and freight elevator are available.
FAQ
How long should I spend at the Diefenbunker?
Allow about 2 to 3 hours for a tour and time to explore the exhibits. Independent visits with the audio guide can also take around two hours.
Do I need to book a tour in advance?
Advance booking is recommended because guided tours can sell out. Booking ahead also helps ensure a place on the tour you want.
Is there an audio guide?
Yes. A free audio guide is available online, and you can use the site’s Wi-Fi to access it.
Is the Diefenbunker accessible for wheelchair users?
The facility has a wheelchair lift at the stairs and a freight elevator. Tours include stairs, so contact the museum to check what access arrangements suit your visit.
