Features America’s tallest freestanding tower with indoor and outdoor observation decks. The tower houses SkyJump, X-Scream, Insanity, and the Big Shot, all open Su-Th, 10 am-1 am and F-Sa until 2 am. Admission to the tower is $20; or, see it with the all-day rides pass (SkyJump a separate price) for $39.95. www. stratospherehotel.com/Activities/Observationdeck. Stratosphere, 702.383.5210.