This Slashdot post links to an excellent site about relics of the World War II – The Serpents Walls. One can see how many items are still out there – mines, rifles, shells, medals, bones, and whatever else is killled by 60 years in the soil.
It doesn’t come as a surprise to me as I am used to hearing similar stories from my grandfather (father’s father). He is from the Smolensk area and they also have war relics there. Mostly this is due to poor municipalities and difficult access to suburban areas with heavy forests, swamps, wolves, snakes, and mosquitos.
Anyway, check the site. It has lots of interesting pictures and broken English. :) It is written by the same author as those well-known Chernobyl notes I linked to before.