My father as a kid, when playing in the forest where his aunt lived, came upon a huge pile of WWII ammunition just slowly rotting away. Mortar shell, grenades,

My father as a kid, when playing in the forest where his aunt lived, came upon a huge pile of WWII ammunition just slowly rotting away. Mortar shell, grenades, tons of ammo, even pretty huge aircraft bomb. It wasn't some fenced area far away with massive warnings and guarded, nope just random place in forest. I mean literally small boy sitting on top of some 200kg bomb. Glad he didn't do something stupid wiping me out of existence. This was around 1960, former Czechoslovakia, eastern tip where heavy fighting occurred during WWII as soviets were rolling over german army. No idea how locals didn't go there, for small boys such things are like magnets.