Part of the roller-coaster renaissance of the 1970s, the Great American Scream Machine put Six Flags on the thrill-ride map. The Scream Machine made the Guinness Book of World Records in 1974 as the longest (3,800 feet) and highest (105 feet) coaster. It still holds its own against more modern machines.
Last year, Six Flags Over Georgia said goodbye to one of its iconic wooden roller coaster, the Georgia Cyclone. Since then, Six Flags has announced that Georgia Cyclone is being converted into Twisted Cyclone, with new smoother-riding steel track and a wilder ride that will take people upside-down three times.