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.

Supposedly Satanic numbers adorn this preserved submarine sail.

This museum glorifies the humble potato.

Home to the deepest rift anywhere on Earth.

Visitors to this library are in for a real-world education in modernist architecture.

A museum dedicated to the history and exploration of both popular music and science fiction.

The only road through the heart of Glacier National Park.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Once a menacing challenge for trailblazers, this trail is now the most scenic drive in Utah.

The deepest lake in the United States, and once the site of epic destruction that lives on in legends.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

The fifth-longest natural arch in the world, and the longest outside China.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

The unusual patterns in this rock formation result from two distinct modes of weathering.

A roaring, awe-inspiring double cascade of icy water flows through woodland Oregon like something out of a Tolkien novel.

The hike through a narrow river flanked by the 2,000-foot-tall walls of Zion Canyon is one of the best in the world.

In 1909, the steepest and most difficult piece of track on the Canadian Pacific Railway was replaced with a series of spiralling tunnels cut into the mountains.

Fossils, railroads, and waterfalls!