Roller Coasters

Kingda Ka's race-car speeds and skyscraper heights are nothing short of record-breaking. The coaster explodes out of the loading area, reaching a top speed of 128 mph on its way to a 90 degree turn for the sky that takes riders more than 40 stories high. Located at Six Flags Great Adventure in New Jersey, Kingda Ka is the fastest coaster in the USA. (Six Flags)