Salt Cave Inc., Naples

Spending time inside Naples's Salt Cave is almost exactly like spending time inside a naturally occurring salt cave in Europe. The floors, walls, and ceiling of the cave are coated in fine salt particles, and large salt rocks can be found all over the cave. The humidity is at 40%–50%, and the temperature is a comfortable 70–75 degrees. But unlike the natural salt caves, this one has soothing music piped in and lounge chairs, where up to eight people relax during salt-therapy sessions. It also has a dedicated children's area, where kids can play without disturbing the adults.

Visitors inhale tiny particles of Himalayan pink crystal salt while they relax in the cave, a practice that is meant to fight respiratory ailments and improve skin. Sessions last for 45 minutes and are complemented by infrared-sauna treatments and other holistic services, such as biofeedback scans.