One of the largest, oldest, darkest, quietest motel rooms in the world.

This historic national park is covered in the stunning ruins of red rock pueblos.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."

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

This secluded aqua waterfall in the Grand Canyon is the perfect swimming hole, and the Havasupai tribe's fiercely protected natural wonder.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Activists are fighting to preserve these unfinished highway ramps as a tribute to the citizen revolt that halted their construction decades ago.

Outside this souvenir shop is a statue of Bigfoot composed of volcanic ash, and plenty more to see inside.

A bust of the first president welcomes visitors to the only town in America called George, Washington.

People come from across the globe to swim in this lake believed to have healing properties.

A rare tour of a commercial jet assembly plant, held inside one of the largest buildings in the world.

This metallic stampede sits frozen on a Washington ridge yet the artist's vision is still incomplete.

From overly ambitious (and eventually abandoned) atomic dream to bustling office park.

This famous bridge twisted itself into oblivion, but not for the reason you might think.

Allowing humans and fish alike to migrate from freshwater to saltwater and back again.

An exercise in patience and imagination, where Mother Earth turned common stuff into precious hidden treasures.

Site of the greatest known waterfall that ever existed.

Legend says that these tall basalt pillars are the petrified wives of a trickster god.

The site of the Wellington avalanche, one of the America's worst railroad disasters.

One small town in the Pacific Northwest transformed itself into a Bavarian-themed tourist destination.

The highest point in Washington state is a volcano covered in glaciers.

This long, dark tunnel is open to hikers, but those without lights are known to get confused even on the straight path.

This medieval village/restaurant perpetually celebrates the year 1376.

An obscure waterfall that looks like something out of a fantasy novel.