The Adventuredome is a five-acre indoor theme park enclosed under a pink glass dome at Circus Circus, one of the older casino-hotels on the north end of the Strip. Inside you'll find a double-loop roller coaster, log flume, bumper cars, laser tag, a climbing wall, and a midway full of carnival games. It's one of the few genuinely family-friendly attractions on Las Vegas Boulevard — no gambling required.
Up on the casino floor, free circus acts (trapeze artists, jugglers, acrobats) perform throughout the day above the midway stage. The acts rotate and are worth catching if you're passing through.