"Urban exploration" means discovering and investigating abandoned urban locations. These secret places are often forgotten, always interesting, and offer a unique window onto the history of a neighborhood or a city. The rush of exploring a place that may have been untouched for years is a sort of thrilling, unsanctioned sightseeing that even seasoned locals may not have experienced. Urban explorers are notoriously secretive about the best locations, so online information can be hard to find. After scouring forums and blogs, Cheapism.com turned up 10 intriguing, abandoned sites that each offer something special, be it history, art, or natural beauty.