The is a great piece over on bldgblog about how Switzerland has rigged many of its key infrastructure points to blow in case it is invaded. Here's a snippet:
Switzerland has more than 300,000 bunkers, enough to shelter all 7.6 million Swiss with one million places to spare. But two decades after the end of the Cold War, the Swiss government says it needs more.
A 1978 law requires every new building to have a bomb shelter, and even as the fears of Armageddon that spurred the original law are now a distant memory, the Swiss have been adding 50,000 new spots a year
A Swiss shelter must withstand an impact of a 12-megaton explosion at a distance of 700 meters (765 yards).