The world''s tallest swing has just opened over a 2,300-foot-tall cliff in China. The extreme ride is 328 feet tall, roughly the equivalent of a 30-story building. It was certified by Guinness World Records as the "tallest swing frx" on Earth as it is 40 feet taller than the last recorder-holder, the B!g Rush in South Africa. The swing can catapult tourists over the cliff edge at a top speed of 80 miles per hour.