Exploring the Innsmouth sim in Second Life. Innsmouth is a ghost town set in the 1930's. It really doesn't get more creepy than this.
(I used the "Big Fluffy Clouds" sky setting in the SL viewer for this video because the region settings seemed a little too dark for filming and weren't coming out like I wanted them to.)
Feel like building your own creepy town? Pick up the buildings and props here: http://maps.secondlife.com/secondlife/Paradiso/126/121/1130