Photo: quavondo / E+ / Getty ImagesThe Frightmare Compound has been bringing customers the terror of a lifetime for 40 years. Founded in Westminster, we have progressed to various cities such as Denver and more. Madness will claw at your senses as you enter the portal of fear itself. Cross the threshold and get lost in the finest horror house you'll ever encounter. Terror bedevils in this Denver property; do you dare to visit its tenants?