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

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

Where the famed daredevil attempted to launch himself across a canyon in a custom-built rocket.

These falls, sometimes called the "Niagara of the West," still put on a good show at the right time of year.

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.

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

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

Ride a gondola up to this historic mountainside eatery.

Home to the deepest rift anywhere on Earth.

Supposedly Satanic numbers adorn this preserved submarine sail.

The world's first nuclear power plant is open to visitors looking to role-play a meltdown.

This town is home to the world’s largest arch constructed entirely of elk antlers.

Idaho’s largest, deepest limestone cave is known for its quirky rock formations and bat population.

A lava tube cooled to form this long tunnel that stays chilly even at the height of summer.

Home to a timed geyser created by complete accident.

A former sanitarium where soldiers were sent to recover in the healing waters of hot springs.

A museum dedicated to the history and art of staying clean.

This museum glorifies the humble potato.

This combination shop and museum is filled with curious items and artifacts.

This inanimate goat created by the "welding nun" has been helping to clean up the city of Spokane for more than 40 years.

This playground sculpture of an icon from the past is dedicated to the children of the future.

This oddity shop contains everything from antique tools to a human skeleton.

The mayor made the declaration in 2004.