One of the world's largest hotels and casinos, MGM Grand also boasts one of the world's biggest nightclubs -- the five-level Hakkasan --along with a 17,000-seat arena that hosts everything from superstar headliners to championship boxing and the UFC. The pool complex is huge and offers both family-friendly and party options, while other entertainment attractions include Cirque du Soleil, David Copperfield, the interactive "CSI Experience," a comedy club, and 10 restaurants. Accommodations range from standard queens and kings, plus 51 two-story Five-Diamond, Five-Star Skylofts, to the ultra-exclusive Italian villas of The Mansion that start at $5,000 per night. For the health-conscious, the Stay Well Collection features amenities that include Vitamin C-infused showers, hypoallergenic bedding, and long-wave night lighting. Also located on the immense property are a convention center and three, 38-story condo-hotels called Signature at MGM Grand.