Quote Originally Posted by Yora View Post
Yeah, when I lived in Hamburg, traffic news said that a road was blocked because of old bomb disposal every few months. Never heard of any of those exploding though, and they are usually discovered when an excavator hits something hard. I've heard it's similar in Berlin.
The swath of modern-day France where the WWI Western Front was fought is still riddled with unexploded munitions. They're buried underground, but get slowly brought to the surface by freezing/thawing, just like rocks. It's so bad in places that there are national preserves that the public is not allowed to enter, and a permanent, professional group of demineurs who go around collecting the various shells, grenades, and bombs that pop up (both inside and outside of the preserves).