My kid is working on a project in 'northern AB' where a large part of the 'renovation' is a large underground bunker, complete with it's own purified air supply, power source (generators) and water supply (well), and also including a 100m escape tunnel. Blast doors on either end, one terminating as hidden in an outbuilding and the other behind a bookcase inside main house.
I guess this should not be too shocking
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