Field of Screams – Mountville, PA This haunt is consistently ranked among the best. It features multiple attractions, including haunted hayrides, haunted houses, and a terrifying forest walk​( ONE37pm | For the Curious )​( PureWow ). Knott's Scary Farm – Buena Park, CA A massive Halloween event that includes haunted mazes, scare zones, and hundreds of costumed actors. It's one of Southern California's largest and longest-running haunted attractions​( ONE37pm | For the Curious )​( PureWow ). 13th Gate – Baton Rouge, LA Known for its movie-like sets and special effects, 13th Gate takes visitors through various terrifying realms filled with unique challenges and scares​( ONE37pm | For the Curious ). The Darkness – St. Louis, MO This attraction offers a multi-level haunted house with high-tech scares and special effects, featuring animatronics, actors, and even 3D elements​( Mental Floss )​( Far & Wide ). SLC Fear Factory – Salt Lake City, UT Spanning multiple buildings with underground passages, this haunt is renowned for its eerie atmosphere and interactive scares​( ONE37pm | For the Curious ). Headless Horseman Hayrides – Ulster Park, NY This attraction includes haunted houses, a spooky hayride, and live entertainment, offering a full-fledged Halloween experience​( Mental Floss )​( PureWow ).