A beautiful geyser under environmental threat.

One of nature's most well-scheduled phenomenons resides in Wyoming's Yellowstone National Park.

The first declared National Monument in the United States.

The largest island on the great salt lake is home to curious creatures and strange stories.

Come for the speed, leave in love with the desert.

The marker offers a rare chance to be in four U.S. states at once, though there's some controversy over its geographic accuracy.

Here, at the "world's longest art gallery," you'll find forty miles of ancient petroglyphs and pictographs.

A classic mystery spot complete with spots that are said to make you shrink or grow when you stand on them.

This museum glorifies the humble potato.

Home to the deepest rift anywhere on Earth.

This conservatory allows a little bit of the tropics to thrive in the middle of a major Canadian city.

This family mausoleum is steeped in symbolism and looks more like a fantasy location than a grave.

This enormous censer uses a pulley system installed over 400 years ago.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

A small Wyoming town is home to the state's oldest-operating soda fountain.

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

Only known mainland rookery of the threatened Stellar sea lion.

After this former brothel closed, its interior remained almost frozen in time.

It was once used as a classroom to teach mining skills to local high school students.

The wooden airship was the largest flying boat ever built.

The largest wooden building in the world now houses a fascinating collection of aircraft.

This unassuming cheese empire in rural Oregon churns out more than 150,000 pounds of cheese each day.

The magic's in the hole!

Despite a legend that says this highest peak in Oregon was climbed in high heels scores of people have died on its slopes.