Hot Springs, located in the southwest corner of South Dakota and on the southern edge of the Black Hills, is the only place where extensive development of curative waters (balneology) has been undertaken in the state. It is built along the banks of the Fall River, immediately below the junction of Hot Brook and Cold Brook. Hot Brook is so named because of the thermal springs originating along its banks and flowing into Fall River. It is entirely spring fed and thus is a dry channel above the Springer Ranch where the last springs flow into the channel