Las Vegas, Nevada
When The Cosmopolitan first opened in 2010, it dared to be sexy, uninhibited, and ballsy -- and nothing’s changed. While it doesn’t have the largest casino floor, its other amenities ensure it lands squarely on this list. All 3,000 rooms have outdoor balconies (virtually nonexistent on the Vegas strip), with half of them flaunting insane views of the Bellagio fountains. The famed Rockwell Group handled most of the design, including columns that project live video, 21 miles of crystal beads at The Chandelier bar, the visually stimulating Marquee Nightclub, and swank residential-style rooms. There are plenty of places to drink (from Rose. Rabbit. Lie. to Vesper Bar), and all your favorite chefs are here (Jose Andres’ China Poblano and Jaleo, Scott Conant’s Scarpetta, and Eric and Bruce Bromberg's Blue Ribbon Sushi).
Pro tip: Bring your pooch! Atypical for most resorts in Vegas, The Cosmopolitan is pet-friendly and has its own “dog park” on the outdoor pool deck.