I used to shoot at a local abandoned gravel pit. Handguns, rifles, shotguns. You could shoot about as far as you wanted to, and the walls were tall enough to contain most any wild shot. I have no idea who owned it, but they didn't seem to mind anyone shooting since there would be a dozen or people out there every weekend. It went on for years. Everyone cleaned up after themselves. About all that was left was busted clay pegions.
Naturally it was just too convient, and people started dumping their trash there. Furniture, old cars, you name it.
Today it's blocked off and the cops will show up if you fire an air rifle.