The Strip, Las Vegas, Nevada
While the main pool here is nothing to write home about, we find the circular European Pool to be a calm oasis, a step removed from the bustle of The Strip. Adults-only can mean peace and quiet when the pool isn't too busy, and it also means that topless sunbathing is allowed. The Island Bar in the pool's center offers drinks, gambling, and prepacked sandwiches. Day beds can be rented for $150 per day.