A living snapshot of a different time in America is preserved and maintained by a community of volunteers.

An urban laboratory.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.

Limestone caves with spectacular showcase chambers.

America's only nuclear missile silo open to the public.

See massive fossils that are over 200 million years old in northeastern Arizona.

This Idaho state park boasts the tallest single-structured sand dune in North America.

This U.S. natural reserve is an ancient spiritual place and rock climber’s paradise.

The only bridge in the United States where BASE jumping is legal without a permit year-round.

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

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

Tucked away on a scenic trail, a modest memorial honors one of the greatest writers of our time.

Rare and gorgeous birds abound in this protected wildlife sanctuary.

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

Home to a timed geyser created by complete accident.

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

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

The largest outdoor art gallery in the Northwest United States.

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

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

Home to the deepest rift anywhere on Earth.

The first declared National Monument in the United States.

These huge stone ovens in the desert fueled the Nevada silver boom, and may have also been a hideout for outlaws.

Ancient pueblos built into the base of a natural canyon wall.