An old California photo stand has been turned into a shrine to the cozy art of crochet.

A 250 million-year-old rock formation has earned a rather unique nickname.

The so-called "Bridge of Thighs" in Palm Springs allows nudists to discreetly cross the road.

The oldest continuously operating mint in the world that has been making coins since the 9th-century.

This bridge was constructed from the rubble of the infamous Bastille.

The original span of a high bridge across the deep Crooked River Gorge has been preserved for pedestrian use.

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

Sharing the often-overlooked story of America's Black soldiers.

A beautiful footbridge with over 2,000 glass sculptures along the walls and ceiling.

Controversially claiming the title of world's biggest bass drum, UT's Big Bertha was once made radioactive by the Manhattan Project.

A Texas cave network is home to some of the world's most spectacular-looking and bizarrely named mineral formations.

This museum started as a collection of Manhattan Projects and continues to add exhibits as they are declassified.

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

The ruins of this abandoned fort now stand as a picturesque reminder of America's march West.

A sprawling collection of over 106,000 toys from around the world.

The oldest continuously occupied public building in the United States.

This high desert botanical garden is a unique display of Northern New Mexico's geology.

This erect, phallic geological spire wasn't always named so domestically.

On the edge of grassland in northeastern Colorado, these rock formations are some of the few remnants of a high plain that has eroded away over millions of years.

In the early 1900s, hundreds of Black Americans found opportunity in this now-abandoned rural community.

You might know it as the Overlook Hotel, but the inside is not going to be familiar.

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

An acoustic anomaly with a mysterious cause.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.