The Skin Spa & Wellness Center, Phoenix

Though it may be advertised as "a very tiny boutique day spa," The Skin Spa & Wellness Center has all the amenities you'd expect at a much larger retreat. The spa's menu includes more than 20 unique facial treatments, ranging from calming blends of seaweed, mud, and paraffin to intense glycolic peels. The aestheticians here favor natural products, using organic solutions and enzyme masks to help clear and brighten complexions. Imported products are used in many of the other services—Italian mud detoxifies during body wraps, and Hungarian salt adds a nice flavor to scrubs.