Cynics may question, "Why does the world need an indoor amusement park?" To them, we reply, "Hello!? Have you been to Las Vegas in July?" Reportedly the largest indoor amusement park in America, the Adventuredome, offers 5 and a half acres of kiddieland fantasies under the protection of a giant, pink glass dome. Best rides include: the Canyon Blaster, a hurtling double corkscrew coaster that climbs to 90 feet; an IMAX film ride through circus clown dementia; Chaos, which spins you forward, backward and upside down; and the Rim Runner, a coaster for those of you who like it wet. There's also the usual fun for the family, like the Ferris wheel, carousel and bumper cars and more clowns than the House of Representatives. The best game plan is to buy a day pass. It’ll cost you $15.95 and allow you the freedom to come and go as you please, although the park doesn't take more than a few hours to cover every ride.