Roughly 17 million letters to Santa have found their way to this Arctic Circle post office.

If you visit Santa's village, you can get your passport stamped to show you crossed into the Arctic Circle.

Though they've since been renamed, these two streets hint at Dublin's darker days.

This is the largest cemetery in Ireland and the first cemetery museum in the world.

This stone harbor was key to Carnlough's limestone industry.

400 million years of erosion shaped these fascinating seaside caves, which made an appearance on 'Game of Thrones.'

Go inside to really appreciate this 500-year-old technological masterpiece.

These shopping center benches are actually a modern art installation.

These seaside shelters once enjoyed by royalty remain a part of local history.

One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

Time has been frozen at this station since the bombing in 1980—or so it was believed.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

A large statue of Pope Gregory XIII in Bologna was disguised as Saint Petronius to avoid destruction.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

This fairy tale forest hides scenes from some of the more obscure and bizarre Western nursery stories.

Built by crowdsourcing, this wooden foot bridge saved a part of Rotterdam that was languishing in wait of city funding.

This old KLM airplane cut into three parts was transformed into an eclectic airport gift shop.

An 80-year-old plane tree is devouring an iron bench at Ireland's oldest law school.

One of Ireland's most infamous prisons for rebels including men, women and children.

A spectacular hidden beach in Ireland has the dark, disturbing nickname of "Murder Hole Beach."

An Irish peat mine has become a stunning sculpture park.

This hotel was once home to a steamliner company and became the final rest stop for Europeans heading to the New World.

Northern Ireland's Brobdingnagian stepping stones.