One of the ghostly stops along Route 66.

A former gold rush boomtown has managed to stay in business for over 100 ramshackle years.

The liveliest ghost town in the state.

California's oldest existing theater building hosted an impressive cast of celebrities, including hosting Mark Twain's first lecture.

A table rock formation that has been intriguing West Virginians for years.

A site where “the ravages of the war are more striking…than any other place in contemporary Spain.”

A cave dwelling that was started by the Celts, expanded by monks, and finished by knights.

A colossal sculptural lion built by the same man who designed the Statue of Liberty.

Somewhere there is a giant who can no longer poop, but now travelers can stay inside his anus.

A remarkably intact castle that once was the largest in Ireland.

A natural arch carved by a river gave its name to the so-called "Cave of Forgotten Dreams."

A rocky Irish outcropping with a history of wealth, conflict, and ruin.

The world's shortest street was created by an awkwardly placed hotel.

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

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

One of the world's southernmost bars.

The Old Mill shown in the opening credits of “Gone With the Wind” is actually fairly new, and was never a mill at all.

A waterfall 600 ft. inside a mountain, once the bane of gold miners, is now a spectacle of nature.

A fitting attraction for the corn capital of the world.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

An entire city block built completely out of petrified wood.

An experimental, automotive replica of Stonehenge.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

Underwater restaurant at the coral reefs of Eilat.