Cold-War era strategic Autobahn segments in West Germany had covered shafts at regular intervals.
Rumors had it that they were supposed to be fitted with small tactical nukes in the case the Sowjet tanks were on the verge of crossing the border…

There were also plans to bury nuclear landmines stuffed with chickens across Germany.

Britain: Some of you will be reduced to nuclear ash, but that is a sacrifice I am willing to make.