Built in 2005 at the top of the Stratosphere Hotel Tower in Las Vegas, this ride isn't kidding around. The second-highest thrill ride in the world at 906 feet above terra firma (second to its nearby Stratosphere brother, "Big Shot"), the Insanity arm extends 64 feet over the edge of the hotel tower, spinning passengers at top speeds. If that's not insane enough for you, hang on. Soon, the spinning gets even faster, and riders are propelled upwards at a 70-degree angle. Insanity creators claim that "riders will experience the thrill of being flung over the edge of the tower" as they look down for a couple of breathless seconds at a glittering Las Vegas far below.