Thermopolis is the largest town in, and the county seat of Hot Springs County,Wyoming, United States. “Thermopolis” is from the Greek for “Hot City”. It is home to numerous natural hot springs, in which mineral-laden waters are heated by geothermal processes. It claims the world’s largest mineral hot spring as part of Hot Springs State Park. The springs are open to the public for free as part of an 1896 treaty signed with the Shoshone and Arapaho Indian tribes.
Because of Hot Springs State Park, tourism is of considerable economic import to Thermopolis. A state maintained herd of buffalo reside in Hot Springs State Park, which extends into the northwest of town. Two hot mineral water concessions, the Teepee Pools and Star Plunge, and two hotels are located within the park. Other tourism-related businesses in and near the town include the Wyoming Dinosaur Center and Wind River Canyon Whitewater.
The Hot Springs County Museum and Cultural Center has an eclectic collection of memorabilia from local pioneers circa 1890 through 1910, with plans to focus on Tim McCoy, who lived in Hot Springs County from 1912 to 1942, during which he built the High Eagle Ranch about 45 miles west of town. He worked for many years as an actor in what are now called B westerns, or lower-budget cowboy movies in Hollywood.