The Qua Spa is a favorite of mine and my wife. The price is a bit high, but considering the service and amenities that come with the spa it is worth it.
While in the spa you have the options of various pools set to different temperatures. There are also heated stone lounge chairs that will help you to unwind. They also have a steam room, sauna, ice room and a shaving room. There is also a lounge area that is stocked with some fruit, teas, coffee and fruit juices.
In the middle of the hustle and bustle of the Las Vegas strip. This is a great hideaway to unwind and relax.