Hot springs are natural geothermal wells that often contain mineral content and therapeutic properties. These pools of hot water have different names in different parts of the world. In Japan, hot springs are known as "onsen," while in Iceland, they are called "geysers." In the United States, hot springs are often referred to as "thermal springs," "mineral springs," or "hot pools." In some regions, they are named after the town or city in which they are located, such as "Hot Springs, Arkansas." Regardless of the name, hot springs have long been enjoyed for their therapeutic benefits and relaxation properties.