Built about 1923, this modest working-class house was the home of the radical Democrat politician and U.S. Senator.
The area relates to its long history of copper production as well as to its role in the development of the labor union movement.
The northernmost campsite of the Lewis and Clark expedition, on its return trip from the Pacific Northwest.
The 1900 Art & Crafts home and log cabin studio of the Old American West artist.
The site of a historic buffalo jump utilized by the Native American tribes, the country's and possibly the world's largest.
The site of the most important fur trading post on the upper Missouri until 1867.
Completed in 1932, it is a scenic mountain road in the Rocky Mountains of Glacier National Park, the only road that traverses the park crossing the Continental Divide.
Commemorates the Western cattle industry from its 1850s inception at the site established by Canadian fur trader Johnny Grant, and expanded by cattle baron Conrad Kohrs.
The route taken by the Lewis and Clark Expedition in 1805 to portage around the Great Falls of the Missouri River during the outbound portion of the expedition.
The Belton Chalet, one of five building complexes in or near Glacier National Park, built by the Railway around the time of the park's founding, using the Swiss chalet as a building model.
A 1913 historic lodge located within Glacier National Park, and one of the nation's finest examples of large-scale Swiss chalet architecture.
A 1935 rustic log building designed by the National Park Service on the road into Yellowstone National Park.
The cave complex was home to generations of prehistoric hunters, drawing human beings for over 3,000 years.
Marks the official start of the Missouri River at the confluence of the Gallatin, Madison and Jefferson Rivers.