A 400-year-old mummified arm dangles from the ceiling of St. James the Greater, serving as a warning to thieves.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Macabre astrological automaton clock dating to the late 1400s.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Real bones which are said to have belonged to a Polish dragon.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

This stunning concert hall has become a symbol of Iceland's national recovery.

An encyclopedic collection of mammal penises.

The picturesque birthplace of Icelandic democracy is drenched in the blood of its brutal past.

A stratovolcano located in the south of Iceland, with a long history of charted activity and a rich mythology attached.

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

Ancient cliffs resembling a kilt on Scotland’s second-largest island emit an entrancing sound.

This dramatic landscape hidden on the Isle of Skye looks as though you've stepped into the magical realm.

These fantastically named natural pools look like something out of a Scottish myth.

The highest point in the state of New Hampshire, and while unlikely "the worst weather in the world," it sure seems that way to hikers.

This historic address is home to the beloved ball and is an almost totally empty building among the most expensive real estate in the world.

Cryptic messages embedded in the New York City sidewalk.

Mysterious 500-year-old tapestries depict a unicorn hunt.

The rusting remains are visible sticking out of the waters of the Delaware Bay.

100 massive sculptures in the Hudson River Valley.

The remains of the furnace and iron works that produced the massive Hudson River Chain still stand in the woods of New York.

A winding, cliffside stretch of road overlooking the Delaware River.