Fueled by the popularity of the hot-stone massage, ancient spa practitioners decided to test out the lava massage, which was much less successful. Relax with below magma-level temperatures with today's Groupon: for $30, you get a 45-minute hot stone massage at Unique Elegance Salon & Spa (a $60 value).

A full-service salon and spa, Unique Elegance pampers skin using all-natural products devoid of harsh chemicals and toxins. The relaxing hot-stone-massage treatment lasts a blissful 45 minutes, during which heated river-smoothed and iron-rich basalt stones are placed at strategic locations on the back to achieve zen-like rock gardens. As the experienced practitioner incorporates the stones in the massage, the heat works to soothe muscles and improve circulation, easing stress and anxiety brought on by Mr. Slate's tirades at the stone quarry.

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