When it's time to go out, celebs would just as soon hop a flight to Sin City than drive to a local club. With casinos as busy at 2 a.m. as they are at 2 p.m., sleep is an afterthought. When you do opt for some shut-eye, make it count. Oprah Winfrey declared that the beds in the recently opened Wynn Las Vegas (rooms from $240; were "the most comfortable" ones she'd ever slept in. Don't need a flat-screen TV in your bathroom or a $32 hamburger? Try the Westin (rooms from $169; The smoke-free hotel has a Reebok gym, 10,000-square-foot spa, and rooms with double-head showers.

Believe it or not, Las Vegas is home to one of the Southwest's best hiking areas, Red Rock Canyon, a quick 30-minute drive from the Strip. The rocky, steep 5-mile round-trip hike to Turtlehead Peak provides a heart-thumping workout, but the park is also a popular destination for some of the world's best rock climbers. If you're inspired, practice your hand- and footwork indoors on the 40-foot rock wall at the Canyon Ranch SpaClub at the Venetian Hotel ($35 for a day pass; across the street from the Wynn.

For an only-in-Vegas spa experience, try the Chakra Balancing treatment at the new 50,000-square-foot Qua Baths & Spa at Caesars Palace (from $255; You'll be one of the first to have your energy centers aligned with massage and warm oils. Or go straight to the source at Hands On Massage (, the company that supplies hotels with in-room therapists. A 60-minute massage ranges from $90 to $100--a bargain in this city.