While I could've sworn we'd linked up London Underground History, I couldn't find evidence for it. With some 40 stations abandoned in various states of disrepair, the Underground is ripe for the kind of spooky exploration that horror and sci-fi novels are often built around. The site includes lots of neat pictures, as well as descriptions of the various "disused" stations.

Just the thought of looking out the window of a subway car and seeing the shadows of a disused station rocket by is enough to give me the chills. SpOoKy!