Salem, MA
Halloween in Salem, Massachusetts is a month-long affair. Deemed "witch city" after the Witch Trials of 1692, the town keeps up with its dark past, ushering in more than a million tourists a year - especially during the fall. Salem combines the excitement of Halloween and autumn in New England for a huge celebration that includes a grand parade, ghost tours, haunted houses, theatrical performances and more.
More info here.
[Photo via @valerieacklin]