18 S. Perry St., Pontiac; 248-332-7884
There's an awful lot of competition in this category; we Michiganders take Halloween very seriously. Ed and Jim Terebus' haunted house, opened in 2000, held the Guinness World Record for the world's largest walk-through haunted house for a number of years. The horned mascot at Erebus is a fixture in downtown Pontiac now. The haunted house spans four full floors inside a 100,000-square-foot building constructed in 1928.
The Terebus brothers publish the Fear Finder guide, so you know they're experts on how to scare the bejeesus out of folks. This attraction is really one of a kind; their attention to detail is as awesome as it is frightening.