Indian Hot Springs (Texas)

The Indian Hot Springs, a cluster of seven geothermal springs with high mineral constituents, are on the Rio Grande twenty-five miles south of Sierra Blanca in southern Hudspeth County (at 30°50' N, 105°19' W). They are within the floodplain, spread out over a 700-by-300-meter area at the southern edge of the Quitman Mountains.
Source