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

Single runway interrupted by a busy road that cuts across its middle.

Red, white, and blue painted steps along with a Union Jack celebrate the outcome of Gibraltar's 1967 referendum.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.

A curious carving hides on a marble column in the Mosque-Cathedral of Córdoba.

Touching this little fossil embedded in the wall of a grand mosque-cathedral may make your wishes come true.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

The flow from this waterfall sometimes comes out of springs below its rim.

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

A showcase of engineering might that was also symbolic of westward expansion.

Commonly referred to as the most photographed Victorian home in the United States.

Humboldt's human-powered sculptures race across land and sea for days on end in a wacky quest for dominance.

This ultra-modern California span is actually a titanic solar clock in disguise built by famed architect Santiago Calatrava.

The long, arduous journey of the stones of the Abbey of New Clairvaux.

Hidden inside a gift shop that doubles as a museum, this gargantuan yo-yo can only be operated by crane.

A picturesque example of brute-force engineering conquering nature.

Home of what was the largest hydraulic mine in the world, producing gold and the first diamonds in the U.S.

California's first suspension bridge.

The oldest orange tree in California spawned a generation of citrus farmers.

Rising out of miles of farmland, these buttes are sometimes called the world's smallest mountain range.

The Empire Mine is "one of the oldest, largest, deepest, longest and richest gold mines in California."

The first U.S. town to secede from the Union, only to vote themselves right back in.

A unique museum where guests can rent and operate a locomotive.

Curiously, this large sporting goods store features 14 wax representations of American presidents.