> Not sure about "many" European countries. Switzerland is certainly the only one who went to extremes on it.
From what I can read, it seems to be mainly Switzerland and Scandinavia.
In Sweden during the cold war it was a requirement for many building permits to add a bunker to the basement, so we still have 65,000 bunkers with about 7 million seats. It's very common to go into the basement of e.g. a library or apartment building and have to pass through massive protection doors with air filters. I doubt any of them are still stocked with food/supplies anymore though.
From what I can read, it seems to be mainly Switzerland and Scandinavia.
In Sweden during the cold war it was a requirement for many building permits to add a bunker to the basement, so we still have 65,000 bunkers with about 7 million seats. It's very common to go into the basement of e.g. a library or apartment building and have to pass through massive protection doors with air filters. I doubt any of them are still stocked with food/supplies anymore though.