Own this Attraction? Horrorween Haunted Warehouse Horrorween Haunted Warehouse is a Haunted Attraction located in Mount Union, PA. Location 300 West Small StreetMount Union, PA 17066 (Click for Fullscreen Map) About This Attraction: Haunt Types: Links: Contact: Horrorween Haunted Warehouse Guest ReviewsGuest Average: 10 out of 10 Wendy Straub – 10/10 – February 12, 2021We had a great time!! View All Submit Your Own Review! See anything that needs updated? Let Us Know!