Thermopolis, WY

united states

Thermopolis sits in central Wyoming's high desert at 4,300 feet, serving as a gateway to Yellowstone via US Highway 20. The main route connects southeast to Riverton (35 miles) and northwest toward the park (85 miles), while Highway 120 heads north to Meeteetse. Most visitors approach from Casper via US 20 and 287, about 130 miles total. The town centers around Hot Springs State Park, home to the world's largest mineral hot spring producing 18 million gallons of 135-degree water daily.