I recently did some relic hunting in eastern Germany right along the border to Poland. There are many old army foxholes around the forest so I decided to buy a metal detector. I ordered a Garrett Ace 150 from Amazon and had it delivered to my Mother in Laws house. I would never have imagined how many WW2 relics are just lying around. Is it safe to be digging this stuff up? Probably not. But I had fun anyway. I think I'll try coin shooting around the ol' farm house next time if the farmer lets me!
http://www.dirtfishing.com/2016/09/ww2-relics-german-militaria.html