From the 14-foot-high salt-water aquarium in the lobby to the 11-acre Mandalay Bay Beach, which includes 2,700 tons of real sand, waves and a lazy river, this hotel offers more than most Las Vegas resorts for non-gamblers. Families traveling with kids are big business for Mandalay Bay, but the hotel covers the adult playground concept, too, with THEhotel at Mandalay Bay, a boutique-style hotel-within-a-hotel that has a separate entrance, check-in and spa. And why not? Space isn’t an issue at this mega-resort which almost feels like a small city—a city with its own 135,000-square-foot casino, 1.8 million-square-foot convention center and 12,000-seat event center that hosts everything from boxing to Beyoncé. The guest rooms recently got a facelift and now are outfitted in classic neutral tones, chic modern furnishings and enormous marble baths. You can even pick your room—maybe an unobstructed Strip view, or one with a spa tub, or perhaps a room with a “playpen couch” that allows for face-to-face seating.

Mandalay Bay Resort and Casino Amenities:

• 4,752 rooms. Wireless Internet access. Restaurant, bar. Fitness center. Pool. Spa. Business center.