Protect and Survive - the British means of surviving the thermonuclear apocalypse involved piling suitcases full of earth on angled wooden doors nailed to the floor. Brilliantly (and unintentionally) creepy, and miles away from the can-do Fallout attitude of US shelter construction.
Excerpts from Expert Judgement on Markers to Deter Inadvertent Human Intrusion into the Waste Isolation Pilot Plant - I don't think I've linked to this already? Whatever, it's one of my favourite things ever, and you may note elements of it leaking into my level design in the past. A treatise on guarding future cultures from stored nuclear waste, some of the language is magnificent. The danger is in a particular location... it increases toward a centre... the centre of danger is here... of a particular size and shape, and below us. The danger is still present, in your time, as it was in ours.