Kingda Ka, situated in Six Flags, New Jersey, has been the king among coasters since it debuted in 2005 – literally towering over its rivals at a terrifying 456 feet (139 meters). Not only the tallest but also the fastest roller coaster on the planet, this bad boy leaves riders with faces whiter than sheets and knuckles all but transparent. Launched by a hydraulic mechanism that takes it from 0 to 128 miles per hour (206 km/h) in just seconds, the train climbs the top hat tower, twisting on its side before the stomach-churning big drop. So tall it was struck by lightning in 2009, Kingda Ka is themed as a mythical tiger and named after the real 500 lb big cat that lives in the pen next door. Bamboo surrounding those queuing and appropriate music top off the Indian jungle motif. A truly wild ride.