50 States of Scary: The Most Terrifying Haunted Houses You MUST Visit in America

McKamey Manor: This could possibly be the most terrifying experience a human could have in the entire world. The interactive haunted house tour that recently moved from San Diego to locations near Nashville and Huntsville, AL, lasts from four to seven hours and requires you to sign an in-depth waiver. Whoa.

Frightmare Manor: This five-attraction scream park is set on the historic blood-soaked property of serial killer Jeremiah Lexer. It's pretty scary.