Twisted Colossus is a hybrid rollercoaster located at Six Flags Magic Mountain in Santa Clarita, California. Originally designed and built by International Amusement Devices, the roller coaster opened as Colossus, a dual-tracked roller coaster, on June 29, 1978. It was the tallest and fastest wooden roller coaster in the world and the first with two drops greater than . Colossus became well known after appearances in film and television, including the box-office hit "National Lampoon's Vacation" and the made-for-TV movie "Kiss Meets the Phantom of the Park".