Corkscrew debuted in 1975 as the first modern-day roller coaster to perform a 360-degree inverting element, twice. It was designed by Arrow Development. Corkscrew is still operating to this day, but was sold and moved in 1989 to Silverwood in Athol, Idaho. Montezooma's Revenge was later opened in 1978 and remains in operation at Knott's Berry Farm.