This intriguing Bronze Age artifact spent centuries hidden within a Welsh faerie hill.

On a winding Vienna side street, one museum has turned their windows into a monument to history’s peace-minded heroes.

The mummified relic of St. Catherine sits forever on a golden throne.

A diverse collection of wax, bone, papier-maché and mummified relics.

In the world's oldest university is a stunning 17th century anatomical theater carved from spruce.

An extraordinary collection of 18th century anatomical waxworks.

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

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

Two cannon-like cranes were installed on top of the bank building to fend off bad feng shui.

Where condemned pirates met their grisly end at the gallows on the River Thames.

One of the figures in this Celtic sculpture continues to puzzle archaeologists.

This stack of stones honors a murdered 18th-century woman.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

It's a mystery why these remains were found with no traces of their bodies in sight.

This Viking gravestone carved in a rare runic style was dug up from a London churchyard.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.

The final resting place for the remains of 143 Habsburg royalty.

The pile of books behind the dignified writer gave the statue a most undignified nickname.

These mysterious Viking chess pieces spent centuries hidden on a remote Scottish island.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

A set of medieval stained-glass windows tell the gruesome story of a Viking siege.