The mysterious white squirrels of this Illinois city are treated like sacred cows.

The former home of the five-time Socialist Party nominee is now a museum dedicated to his career.

In an alley not far from where two great highways meet, byways of a very different sort are honored.

A replica of the flagpole that gave a frontier town its name.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.

A planet-hunting astrograph built in the 1920s to seek out the so-called "Planet X" beyond Uranus.

The final resting place of the businessman-turned-astronomer who helped discover Pluto stands near his observatory.

One of the world’s largest collections of petroglyphs records 2,000 years of human activity.

Oddly shaped rock formation, misassociated with a nearby utopian community.

These tall, red sandstone pinnacles outside Moab are often forgotten amid their more famous neighbors.

A ghost town that held steady longer than most, but finally gave up the ghost.

Thousands of years ago, Indigenous people painted images onto these canyon walls that are still on display today, provocative, mysterious, and enduring reminders of the people who lived here long ago.

A house carved into a rock in the 1940s.

Few things look more out of place than the electric blue ponds in the reddish-brown desert of Utah.

Visitors can walk over the largest concentration of Columbian mammoths to have died from one event.

Once one of the most polluted caves in America, now an environmental success story and a museum dedicated to caves.

One of the few surviving "Wigwam"-themed motels.

Prehistoric animals decorate this popular outdoor park.

The world's longest known cave system.

These delicate buggers are some of the rarest fossils that have bubbled up from the Tar Pits.

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

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

This once-booming Gold Rush town is now home to a herd of feral donkeys.