2 Best Sights in Thermopolis, Cody, Sheridan, and Northern Wyoming

The land that became Wyoming's first state park in 1897 had always been sacred to Native Americans because of its healing natural hot springs. You can partake of these waters by soaking indoors or outside at the free 104°F mineral pools at the State Bath House, which is a central feature of this impressive 1,104-acre park that's also home to two waterparks (which charge admission fees) with more indoor and outdoor hot mineral pools, waterslides, and other amusements. You can also hike or bike on 6 miles of trails, view the park's sizable bison herd, traipse across a swinging suspension bridge that traverses the Big Horn River, offering views of the dramatic travertine mineral terraces.

Among the nearly 60 dinosaur skeletons displayed at this nonprofit museum and research center is the winged "Thermopolis Specimen," the only Archaeopteryx exhibited outside of Europe, and "Stan," one of the most complete Tyrannosaurus rex skeletons in the world, measuring 35 feet long and weighing in at nearly 6 tons. Special full-day programs allow kids and adults to try their hand at paleontology by digging in one of the several active dinosaur sites nearby (some 10,000 dinosaur bones have been excavated in the vicinity since 1993). Tours of the dig site are also offered daily in summer.