Stuff on the Sidewalk Mystery Cache

The other day I was driving around and saw all this stuff lying by the side of the road, right on the sidewalk! Man, I thought, the things people leave outside these days. You'd think in these economic times people would take better care of stuff. And then I came up with an idea for a puzzle. I thought, I wonder if people can tell me where I saw all this stuff? Yeah, that'd make for a cool puzzle! So there you go. Where are these things? Then go find my cache.