As more hotel guests have become aware of the benefits of visiting a spa, designers have also begun incorporating treatment rooms into their hotel blueprints. Today, these palaces of pampering have become a multi-billion dollar industry. Hotel spas not only offer a wide range of services that can make customers of either gender look and feel better, they also have a distinct advantage: after a relaxing treatment, spa visitors can walk back to their on-site accommodations or relax by the property’s pool instead of raising stress levels having to fight traffic on their way home. Here are our selections for our top ten spa hotels around the world.