My favorite destination in all of Las Vegas is the Big Shot slingshot, free fall thrill ride at the top of the Stratosphere [1] . They have added a new ride called the Insanity. As much as I love the rush of an exciting ride, this one even scared me. All I could think about was how badly I wanted to see my wife and kids again. It wasn't as scary the second time.
Links:
[1] http://www.stratospherehotel.com/las_vegas_stratosphere_ride.html