This repurposed church offers a more literal way to get closer to the heavens.

This 16th-century close preserves an unusual piece of Edinburgh's transportation history.

These steps offer a breathtaking view of one of Europe's most besieged fortresses.

Anonymously sculpted and donated, these sculptures made from poetry books and pages are sprinkled around the city.

Long abandoned underground complex to keep royals safe from a nuclear war that never came.

An American ghost town hides along a side street in Scotland's capital.

Come for the oysters, stay for the priceless art honoring inventors across history and Scotland's favorite outdoor sports.

The taxidermy remains of the first mammal ever cloned from an adult cell are on display in Edinburgh.

Depending on the region's rainfall, this church may be partially submerged.

In the hometown of the Catholic saint and Nobel Peace Prize winner, a memorial dedicated to her legacy.

A historical puzzle lies at the origins of this structure.

It's unclear what caused the fire that led to this opulent hotel's demise.

An abandoned resort in North Macedonia is a relic from the Communist Party of Yugoslavia.

This abandoned prison was so notorious that its name has become a metaphor throughout Albania.

Once a safe haven for locals engaged in blood feuds, this 400-year-old fortified tower is now a museum showing what life was like for those lying in wait within its walls.

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

Beautiful steampunk ghosts of early Massachusetts.

The massive machine creates cracking displays of indoor lightning.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

An enormous, inside-out glass globe built in 1935.

One of New York's best collections of pinball is hidden in a secret bar in the back of this laundromat.

This abandoned subway station beneath the Waldorf-Astoria hotel is allegedly used to secretly transport presidents.