Sundays are often considered a lazy day—but you're in Vegas! Make it wild with a trip to Stratosphere! Almost nothing is as heartstopping as the threat of being dropped off the side of the Stratosphere—100 stories up. Accomplish that with X-Scream, seen here (it's actually less scary at night, when you can't see what's on the ground below you). Best deal: the $36 all-day pass.