Unlikely as it may seem, Las Vegas is one of the world's top rollercoaster destinations, with some of the fastest, biggest, and most innovative rides.

Some of the best are atop the 1,149-foot (350m) Stratosphere Tower, the tallest freestanding observation tower in the United States and the tallest building west of the Mississippi River. Thrill seekers can enjoy excitement over 100 stories above the ground on four exciting rides: Sky Jump, Big Shot Insanity and the X-Scream. The latter should be experienced only by veteran rollercoaster fanatics or those wearing adult-size diapers. There is also a revolving restaurant at the top of the Stratosphere, which offers great views but pretty average food. Best ride first, then eat.

The Sahara Casino and Hotel is home the Speed Ride, while Circus Circus's Adventuredome has the Canyon Blaster - the only indoor double-loop and double-corkscrew rollercoaster in the world - and Chaos, a ride designed to offer a different experience each time. New York, New York Hotel and Casino has the Manhattan Express, another high quality ride that gets rave reviews from rollercoaster connoisseurs.