The term Spa is derived from the name of the town of Spa, Belgium, where, since medieval times, illnesses caused by iron deficiency were treated by drinking iron bearing spring water. In 16th century England the old Roman ideas of medicinal bathing were revived at towns like Bath.
The category is intended to cover locations not already belonging in the "Hot Springs" category. For example, this would include mineral baths in which the water is known for its curative properties but requires human intervention to be heated to a pleasant temperature. Also, some mineral baths may be located at sources of water which are cool or cold, or the water may be transported from another location, or minerals may be added to otherwise unremarkable water. Establishments which are primarily swimming pools or water fun parks are excluded. If you would like to include a hot spring or thermal bath in this category, you may, but please log it first in the Hot Springs category.
Turkish Hammams (Baths) are also included in this category. We'll define this loosely as a really special destination steam bath experience (No unremarkable health club/hotel saunas or steam baths please).
Pubic Saunas are also included in this category..
Lastly what are called "Day Spas" in the U.S. will also be included. These offer massages, facials, nutritional counseling, etc. and focus on "well-being" but are not necessarily oriented around water. Establishments must be truly dedicated to such well-being treatments. Establishments offering haircutting or pedicure services are excluded.
Establishments of ill repute are excluded.