The arch that celebrated the completion of the Lincoln and Victory highways.

Local history museum with mammoth bones and an old myth about local giants

This massive crater in the middle of nowhere was used to train astronauts for moon landings.

Odd outsider art installations surround a Gold Rush-era ghost town.

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

A sculpture for the sun and stars, created by Nancy Holt.

Sandstone rock formations that look like they belong on the cover of a progressive rock album.

These curious caverns have been home to mushrooms, gangsters, and disco.

A pop-culture attraction outside of Dyersville, Iowa, hits a home run.

Religious statues built because of one man's bargain with God fill this peaceful sculpture garden.

This collection of neon icons is preserving Arizona's history, one sign at a time.

The winter home of thousands of beautiful snow geese and sandhill cranes.

A blacklight journey through a celestial art exhibit.

When life gave this firefighter a forest fire, he made a rough-hewn sculpture park using a chainsaw.

An abandoned amusement park based on the popular 1940s Red Ryder comic strip.

Natural sonic phenomenon comes with a grisly legend of murder and blood.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

A cave's rare beauty held a cavernous secret hidden underground.

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.

Twice a year, visitors can tour the desolate site that birthed the Atomic Age.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A lifetime's accumulation of bric-a-brac and kitsch.