There's are a few spots in Grand Rapids where they truck in the snow from parking lots to clear them out that my brother and I 'discovered' while we were in grade school. We'd go hunting and scrounging there every time it warmed up, you'd be surprised at all the stuff we've found. Wallets, loose cash, pretty much anything people could drop we've found there. Still occasionally go through some of them when he's in the area and we just feel like wandering around in some of our old territory.
I'm kind of expecting a muggy wet summer here this year.