This natural Icelandic fissure allows divers to swim right between two volatile tectonic plates.

A hugely vast Irish landscape of barren rock that stretches for miles.

Ruins battered by centuries of war and disaster offer a wondrous glimpse of medieval Ireland.

The modern birthplace of Irish freedom.

A collection of noses tucked inside an art museum reveals how times have changed.

The art museum is decorated with creatively remodeled pre-Nazi swastikas.

Copenhagen's celebrated theme park and gardens.

Despite finally receiving electricity in 1970, this tiny town is now deserted.

This remote island village was in danger of depopulating completely until a tunnel was built to connect it to the rest of the world .

The narrow passages will challenge even the bravest driver.

In Faroese legend, this sinister horse-shaped beast lures unsuspecting passersby only to drown them in the lake.

The largest lake in the Faroe Islands seems to be held hundreds of feet above sea level thanks to an optical illusion.

Located more than 600 feet beneath the North Atlantic seabed, this tunnel boasts the world's first undersea roundabout.

This mysterious, medieval cathedral remains unbuilt but fiercely protected.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

This lakefront cottage was crafted in the 1800s and was once a sanitorium.

A historic and oft-filmed prison stands in a Chicago suburb.

A small abandoned and abused cemetery that has become a magnet for ghost hunters.

One of the few remaining relics of the meatpacking hub that made Chicago the "hog butcher to the world."

A century-old hotspot for jazz, frequented by everyone from Charlie Chaplin to Al Capone.

This replica Viking village was created for a film that was never shot and is now open to visitors.

This elegant arc of a waterfall marks a religious turning point.

Iceland's largest lagoon is home to stunning multi-colored icebergs.

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.