1. Basement of the Dead — Aurora, Illinois
In the '60s, a boiler in a suburban Illinois laundry company exploded, burning two maintenance workers. They went missing, and a year later, other employees began to disappear, their bodies found in the river nearby. The building closed and was never used again...until now. Good luck.
2. Labyrinth of Fear — Fujiyoshida, Yamanashi, Japan
Okay, this place is fucked up: There used to be a hospital at the foot of Mt. Fuji, but business went south when staff started stealing patients' organs — and this building is *that* hospital. There are even pitfalls and traps to make the whole experience even freakier, which designers have dubbed "horror harassment."
3. Fear Factory — Salt Lake City
This 100-year-old factory is a paranormal hotspot and horrifying haunted house attraction. Literally every fear you could ever have comes to life here, and here's the worst part: You can’t shake that dreadful feeling that real, horrific events happened here.
6. The Ghoullog — North Conway, New Hampshire
The Ghoullog does a complete redesign every single year, which is an insanely creative way to have people come back. Oh, and if being grabbed is not your thing, stay back: You have to sign a waiver saying it's okay for cast members to touch you.
9. Fright Nights at Walibi Holland — Biddinghuizen, Netherlands
There are a few different haunted houses to choose from, but the spookiest might be the Hollywood Mansion, where they re-enact horror movies. You'll see horrifying villains like the Saw doll on his bike, and demons in pig masks running around. HAHA, NOPE.
15. McCall's Haunted Farm — Moriarty, New Mexico
The McCall family owned this farm for years, until the city built a highway through it and the family disappeared. Rumor has it that Mr. McCall slaughtered his wife and kids, which makes walking around this place at night extra comforting, no?
17. Haunted Hornet — Alameda, California
A Navy vessel called the USS Hornet was sent to the Bermuda Triangle on a confidential mission in the '70s, and after it returned, some creepy shit began happening aboard. Set on the actual Hornet itself, this bloody haunted house gets inside your head.
—Barbara Barron and Kellee Butler, Facebook
18. Nightmares Fear Factory — Niagara Falls, Ontario
You've seen the endless hilarious photos of people getting horrified at Nightmares Fear Factory, but possibly the scariest thing about this place is that what happens inside is such a huge secret that you just have to see it for yourself.
—Mallory Amanda, Facebook
21. The Mortuary — New Orleans
Woods of Terror is in Greensboro, North Carolina. A previous version of this post misidentified the state.