Dark chocolate is known for its age-fighting antioxidants. Some beauty experts have taken this concept to the next level. The Aquapura Douro Valley Resort and Spa in Portugal offers a 40-minute chocolate facial, in which the face is slathered with creamy, melted, oxygen-infused Swiss chocolate. The spa claims that the facial "helps deliver the chocolate's vitamins and antioxidants deep into the skin to better fight aging, promote healing and accelerate cellular rejuvenation." This could be one of the sweetest spa treatments around.