Architect David Rockwell has constructed an 80-ft. tall "treehouse" inside Crystals at Las Vegas' $8.5 billion CityCenter to house a dramatic new eatery called Mastro's Ocean Club. Guests enter the restaurant through an elegant portal of wood-lined lowered ceilings and meandering walls into a dining room featuring curved white leather booths and banquettes accenting hand-crafted mahogany beams and sapele wood. On the dining terrace, Mastro's offers views of the angular shapes, towering ceilings and the unique artistic elements of Crystals. The signature grand bar and piano provide a livelier, energetic dining atmosphere with live entertainment seven days a week. Crystals is the nucleus of CityCenter, located on 67 acres between the Bellagio and Monte Carlo resorts on the Las Vegas Strip, features several hotels, entertainment venues and luxury boutiques.