Castle Park, formerly Castle Amusement Park, is a 25-acre amusement park and family amusement center located in Riverside, California. The park utilizes a medieval "castle" theme and includes attractions such as a miniature golf course, arcade, and 27 amusement rides including three roller coasters such as "Merlin's Revenge", a junior rollercoaster, "Screamin' Demon" a spinning Wild Mouse rollercoaster, and "Little Dipper", a children's rollercoaster. The main "castle" themed building, houses the arcade as well as its only dark ride; "Ghost Blasters", an interactive attraction, designed by Sally Corporation, which can also be found at other amusement parks throughout North America. The park was designed, built and operated by Bud Hurlbut, who designed several rides at Knott's Berry Farm.