An impressive waterfall nestled in the cliffs of Idaho's Snake River Canyon.

One of the "twins" in these falls on the Snake River was sacrificed for hydropower generation in the 1930s.

This underground cave located in the most barren reaches of Idaho is filled with ice year-round.

This landmark is a central figure in the Nez Perce origin story.

This set of hot springs also comes with fantastic views.

Rare and gorgeous birds abound in this protected wildlife sanctuary.

This highest peak in Idaho can only be reached by traversing a formation known as "Chicken-Out Ridge."

These century-old beehive-shaped kilns were built to produce charcoal for nearby mines.

A small section of Boise, Idaho maintains the unique culture and traditions of the Basque people.

A wild west land agreement was etched right onto this historic Idaho stone.

A few dilapidated structures are all that remain of this deserted former silver mining town.

A legal loophole makes it possible to get away with murder within this 50-square-mile section of Yellowstone.

A petroglyph map of the upper Snake River carved by prehistoric hunter-gatherers.

See just what life was like in a 19th-century prospecting town.

These black pillars of volcanic basalt seem to call mountain climbers with an unbreakable siren song.

Natural rock water slides hidden in the remote forests of northern Idaho.

Home to the deepest rift anywhere on Earth.

A mining town, now abandoned, was built in a canyon so narrow that the railroad ran right through the hotel lobby.

This museum, established in Butte's lost Chinatown, celebrates Asian-American culture in what was once the world's largest mining camp.

A classic theatre located along a desolate Montana road.

The source of America's longest river is also a historical landmark and the start of a famous nude run.

Spectacular views await visitors to this lake.

The formidable fowl can be found standing near an isolated hiking path.

The shortest river in America flows for just 201 feet.