Last weekend my friends and I took the Haunted Chicago Tour around the city. It was scary. Not because we saw any apparitions, but because the tour guide told us so many spooky Chicago statistics. (Spoiler: Lincoln Park used to be the Chicago City Cemetary! There are 11,000 bodies buried beneath it!)
I cannot say enough good things about the tour. It was a little pricey, but a very fun thing to do in Chicago in October... especially if you go with a group. I would NOT have wanted to go alone. Creeeepy!