Built in the 1930s by Boyce Luther Gulley for his daughter, Mystery Castle is located in the city of Phoenix, Arizona, in the foothills of South Mountain Park. Held together by various materials, the 18-room castle, three-story castle was built using stone, adobe, automobile parts, etc. The castle features a chapel, cantina, and even a dungeon! There are some unfinished parts, and plumbing and electricity weren't added until 1992. The property is now maintained by the nonprofit Mystery Castle Foundation and has been designated as a Phoenix Point of Pride.