The Diefenbunker is Canada’s most significant surviving Cold War artifact. It is an impressive four-storey underground facility that operated as the country’s central communications headquarters during the Cold War, ready at any moment in case of a nuclear attack. Now a museum, the Diefenbunker offers a one-of-a-kind experiential learning environment, coupled with award-winning programs, events and exhibitions. During Digital Doors Open, you can explore this site through a series of virtual tours, download some colouring pages from their collections, or keep busy with various jigsaw puzzles. And learn more in the video below from Historica Canada about the Cold War and the important role this site played.