If you like to be creeped out while sitting in front of your computer... Well, you could try to visit this Myst-like site by Schumanncombo.com. My suggestion is to do this alone in the dark for extra creepy points. It's just empty industrial places with painted on murals. The ambient sounds will complete the illusion of being there, enough to make you rear back a few times. Flash animation, and some mouse hunting to move you on to the next rooms. Room 44 got to me, more spooky ones in the later half.
As always, the headline of the post is a link to the site. Or if you like, click here.