Asylum Haunted House, Northglenn

An age-old question has plagued casual dwellers for over a century—why is the 13th floor absent in so many buildings? 13th Floor Haunted House in Denver aims to explain this question by staging a horrifying haunted experience. Designed by world-renowned haunted house designers and featuring makeup and effects from Hollywood special effects artists, the graphic theatrical show takes brave souls on a ride through three new gut-wrenching attractions in 2015—Feral Moon, Hallow House, and Undead: What Lies Beneath. The bone-chilling adventure has been met with several accolades, including seven consecutive Hauntworld.com honors as one of the best haunts in the U.S.