While most spa rituals date back thousands of years, one in France is more modern. The French practice thalassotherapy, which is the use of heated seawater as a form of medical care and therapy. This custom was developed in the north of France in the 19th century and remains popular for its health benefits. You won’t find these salty retreats everywhere in the country, though. Thalassotherapy spas must be near the coast. The seawater in the treatment pools must be completely natural and identical to the water in the ocean. Additionally, the water needs to be freshly drawn and then heated to precise temperatures. Most centers also offer a range of other ocean-inspired treatments, including seaweed wraps and the application of mud found in the ocean.
Japan
Japan, like Iceland, is a volcanic region. Therefore, natural hot springs can be found throughout the country’s islands. Bathing in these waters has been enjoyed for thousands of years, and onsen culture remains popular to this day. Onsen are the hot springs as well as the facilities surrounding the mineral pools. The types of onsen can vary greatly, but all must have water that is sourced from underground with a minimum temperature of 25ºC. The water must also have certain minerals at required levels of concentration. Once those requirements are met, onsen may feature traditional mixed-gender bathing or have separate baths for men and women. However, not all one’s time is spent in the baths. Visitors can get additional treatments and may also choose to dine at the onsen to make the most of their time.
