Halloween is haunted houses. Pumpkins galore. Harvest fests. And trick-or-treating. But in Chicago, Halloween also inspires a host of awesomely one-of-a-kind activities, from a spectacular downtown parade to a spooky nighttime adventure at the Shedd Aquarium to fireworks set to a ghostly soundtrack. If you're looking for a few chills and thrills with an emphasis on treats and fun, check out our picks for six family-friendly Halloween events in Chicago.