Ruins of a once-prized railroad station in New York.

This line of 12 tower mills described in the story of Don Quixote is among the most iconic landscapes in Spain.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

It's believed this well was once plagued with evil spirits until St. Columba purified the water.

Columbus' failed colony in the New World.

This extraordinary Viking artifact has traveled throughout the city.

Now isolated, this church was once the center of a bustling village that succumbed to the Black Death.

Home to the infamous "Typhoid Mary" and the worst loss of life in New York's history prior to September 11, 2001.

Buildings that dynamite couldn't bring down were abandoned because of bathroom issues.

The graffitied ruins stand hidden within the Pennsylvania woods.

A planned settlement in Pennsylvania once housed the aristocratic refugees of the French Revolution.

Visitors to Salt Springs State Park are encouraged to literally put their two cents in Penny Rock.

A mysterious echo seems to defy the laws of acoustics.

This lovely little pond is named after the hundreds of soldiers' corpses that were rolled into the waters during the French-Indian War.

The original Uncle Sam was actually a New York meatpacker who is buried under this historic grave.

Dedicated to the art and science of glass in equal measure, this space is as much laboratory as museum.

The little-known final resting place of one of America's greatest writers.

The wooden octagon in which Huckleberry Finn and A Connecticut Yankee were born can still be visited in upstate New York.

Abandoned for over a century, this chilling train tunnel is now a destination for ghost hunters.

Legend says that this short Canadian tunnel still holds the dying screams of a girl who burned alive.

The "last holdout of the Confederacy” actually sat at the edge of the Canadian border.

A natural gas leak provides a flickering flame beneath a waterfall.

This sprawling collection of saintly relics includes such fascinations as wood from the Cross of Jesus and threads from Mary's veil.

Home on the Hillside, and home of the first breakfast cereal.