World's Strangest Spas
Galos Caves, Chicago
You no longer have to visit Poland to experience salt caves built with crystals from the Black Sea—thanks to the Polish and Ukrainian specialists who came to Chicago to construct the first U.S. salt-iodine caves (opened in 2005). Visitors spend about an hour in the dim caves, relaxing on lounge chairs amid kitschy decorations of seahorses and mermaids, listening to calming music, and breathing in the salty air. The environment is supposed to ease asthma and digestive issues. Kids make a beeline for the "saltbox," where they can play with brightly colored beach toys.