While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.

Celebrated in poem, this tiny hidden cemetery has a big and grisly history.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

This neon landmark has been posing this deadpan question to follicly-challenged Dubliners for over 50 years.

This 14th century tower house was once the home of Irish poet W.B. Yeats.

Honoring one of the first boats to leave Ulster destined for America.

A peace symbol in Northern Ireland is among the world's largest hedge mazes.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

A unique work of automotive art calls this shopping center home.

This 1920s Amsterdam neighborhood was built as a giant experiment in concrete construction.

A hidden church in a hidden courtyard tells the story of the Miracle of Amsterdam.

This subterranean studio is filled with fascinating kinetic art.

Scattered throughout London are ancient remnants of the city's former bounding wall.

A makeshift shrine to the late rock star is still kept up on the nondescript façade outside 1 Logan Place.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

This South London cemetery holds the remains of more than 15,000 people.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

Final resting place of the author who wrote the ghost story "The Turn of the Screw," and his brother, the Harvard doctor and paranormal investigator.

This knick-knack-covered house (complete with a matching van) is a charming oddity in the middle of a modest downtown neighborhood.

Grave of the man allegedly responsible for a series of infamous murders in Boston in the 1960s.