Is anyone else here interested in bunkers?

I am. In particular, command bunkers. For instance, a tiny nation like Israel, which can be overflown in 15 minutes (provided you can manage not getting shot down by the IDF/AF) must have some interesting command bunkers for the event of total war. Keeping the military top brass safe from air attacks and in touch with frontline commanders must be paramount, especially for smaller nations.

Does anyone have any pics/info on the command bunkers of various nations?