For the thrill of your life, head to the top of the Stratosphere on the north end of the Strip. My favorite is the Big Shot -- I can't count how many times I've been. Take the elevator to the very tippy top, where you'll find yourself outside, literally on top of the 921-foot tower. Then you'll be strapped in and shot up in the air, where you'll pause to take in the sites before coming back down so fast you reach negative G force. Oh, I love it! There are two other rides up there, and for the really brave, you can now jump solo over the edge (yes, from the very top), with harness technology that allows you to land on the ground right on your feet.
If not for the views, then head to the top floor of the stratosphere for the thrill rides. Opt for getting thrown off the side, shot up another ten floors, or as I did, the bungee jump (best thing I have EVER done). Best done at night, of course.