The largest outdoor art gallery in the Northwest United States.

Home to a timed geyser created by complete accident.

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

An Idaho legend carved out a cave village with his own two hands.

The mayor made the declaration in 2004.

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

This trail leads to a mine that was used as a sanctuary during the Great Fire of 1910.

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

When in Idaho, sleep in a giant potato.

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

Sweet Willy, at 30 feet tall, is the world's biggest beagle.

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.

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

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

Home to the deepest rift anywhere on Earth.

A museum dedicated to the mysterious cryptid.

Visitors to Salt Springs State Park are encouraged to literally put their two cents in Penny Rock.

This abandoned limestone quarry now provides visitors with multiple, breathtaking viewpoints.

An architectural gem nestled into a promontory overlooking a prehistoric landscape.

Also known as "Robin Hood's tree," this tree became a famed location along Hadrian's Wall before it was cut down in an act of vandalism.

The ruins of a rural church and a statue of Archangel Gabriel are tucked away in Majella National Park.

One of the most well-preserved mammoth specimens in the world.

Overlooking Puget Sound sits a garden with a Buddhist prayer wheel and an elaborate labyrinth.