Largest man-made excavation on earth!

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

An architect's childhood fantasy treehouse made real.

A beautiful geyser under environmental threat.

Home to the deepest rift anywhere on Earth.

New Plymouth, Idaho is the only U-shaped town in the United States.

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

A former gold rush boomtown has managed to stay in business for over 100 ramshackle years.

Three generations of intrepid collectors display their curious artifacts in a homemade museum right next to the caves they discovered.

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

Boise State's stadium was the first non-green football field in the world.

Jail from the 19th century that was built by inmates.

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

Rare and gorgeous birds abound in this protected wildlife sanctuary.