X2, Six Flags Magic Mountain, Los Angeles, Calif.

Having the world’s first 4th dimension roller coaster apparently wasn’t enough for Six Flags Magic Mountain because they reinvented and renamed X and it became X2, the world’s first 5th dimension roller coaster. With a uniquely designed wing-shaped track, the seats extend off the track to the sides and hang mid-air which allows them to rotate 360 degrees around the 3,600-foot maze of steel. At a height of more then 20 stories, riders also experience sensory effects like flashing lights, fog, and flamethrowers, along with a unique musical score featuring everything from Frank Sinatra to Rage Against the Machine. As passengers scream along at 76 mph upside-down, backwards, and forwards, they will never know what to expect next.

For more information: Six Flags