This famous Nevada gold mine, once a hotbed of Wild West shenanigans, is now open for tours.

The largest man-made crater in the U.S. marks the spot where we once tested mining with nukes.

There's nothing creepier than a cemetery next to a clown motel.

This amazingly preserved Gold Rush town is a historian's dream.

The city is full of whimsical portals to another world.

This once luxurious Catskills resort is now a haunting ruin.

Walk the whole Mississippi River!

Display that gathers the basic elements of the universe in one convenient location.

A little piece of the Shire is hidden behind a plant nursery in Port Orchard, Washington.

"I did this all while you were watching TV."

A white oak with property rights.

Florida castle built with aluminum printing plates.

The world's only museum devoted solely to the art and collection of action figures.

These Great Lakes sea caves accessible by boat in the summer turn into temples of ice reachable by foot in the winter.

Nondescript elevator doors open to reveal a stunning, surreal world.

The highest bridge in America was built for an almost unnervingly small amount of money.

This road in the Great Smoky Mountains was supposed to assuage a displaced community, but ended up a $52 million dead end.

A Prada store in the West Texas desert that is never open for business.

This intricate Hindu temple is the largest of its kind outside of India itself and was constructed like a giant puzzle.

Reclaimed by nature, the ruins of Doodletown, New York are remnants of a town consumed by a state park.

In a city filled with Frank Gehry buildings, one stands out as one of the architect's weirder works.

These molds for fiberglass statues have formed an eerie, accidental sculpture park.

Earth's tallest volcano is sacred to Native Hawaiians, and home to a dozen world-class observatories.

Some of the tallest ancient American ruins continue to inspire awe and curiosity.