@sinituulia where I live we have old WWII shelters, but they aren't in an usable state; periodically they open them for visits, but I've never managed to go to one.On the other hand, some 10 km north of here there is the border with Switzerland, and over there afaik up to a few years ago every newly built building had to have enough shelter space for all of the expected inhabitants, which is how I know about shelters in residential houses (afaik these days they are mostly used as storage)I've never been in one of them either, however.I've driven on the motorway in the Sonnenberg Tunnel, does that count? :D (I don't think so) en.wikipedia.org/wiki/Sonnenbe…edit: I've just noticed that I had copypasted the wrong URL (and now you all know what I was talking about with friends yesterday evening)