I'm going to keep starting new threads to get more traffic in this forum. 
I love reading about creepy places. Stull, Kansas is a good one.
More locally to me is St Mary's Church, Clophill, which has all kinds of rumours about it (including some silly ones about why it was abandoned- it was just too small!). Some weird stuff did happen in the 60s with graves being broken into. If you go there in the dead of night, you may be unlucky enough to encounter some teenage goths snogging.
Anyone else know any good ones?