A treaty between the Shoshone and Arapaho nations and the United States specified that the waters of the hot mineral springs at Thermopolis would be available to everyone free of charge. The agreement continues to be honored at the State Bath House in Hot Springs State Park. Petroglyphs, 30 miles northwest of Thermopolis and about 8 miles off SR 120, are etched on a south-facing cliff at Legend Rock State Petroglyph Site. Learn More...