Thermopolis

Thermopolis, a small Wyoming town on the Bighorn River, claims the world's largest mineral hot spring — "The Big Spring" — within Hot Springs State Park, where the geothermally heated waters have been open to the public free of charge since an 1896 treaty with the Shoshone and Arapaho tribes. The town's Greek name, meaning "hot city," reflects its identity: natural hot springs are the main draw, and the state park sits at the centre of the visitor experience.

• Population2,974
• Nearest water from center 0.7 km0.5 mi
• Nearest mountain from center 1.5 km0.9 mi