In 2013, historians discovered a hidden room devoted to the art of making royals' hot chocolate.

The steepest classic funicular in the world glides along a dizzying incline.

This alley off Edinburgh's Royal Mile contains remnants of the city's seedier history.

This legendary dessert was served to Nobel laureates for decades.

Every September, international competitors flock to a tiny Scottish island's flooded quarries.

Originally intended as a temporary installation, this sculpture is now a permanent part of a stunning Scottish beach.

A king's bloodstained shirt is among the gruesome collection of artifacts displayed below Stockholm's Royal Palace.

This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

Every Tuesday, students let off steam by screaming into the night air.

This grisly exhibit houses skeletons and weapons from a devastating 14th-century clash.

The discovery of an old wall led to the creation of this fascinating museum about the city in the Middle Ages.

It is said that each of the white stones in the red facade of this medieval house represents the head of a murdered Swedish noble.

Dine on food tied to Viking history and legend at this subterranean Stockholm spot.

A man has revenged his true love's betrayal through tears and stone genitalia.

This Stockholm light tower can be controlled by anyone with a smartphone.

The world's largest model of our planetary system.

An illuminated manuscript comprising the life's work of a lone monk, inexplicably decorated with a portrait of Satan himself.

A floating underwater hotel, created by a Swedish artist.

The blood-soaked ruins of the castle where the murderous Blood Countess was walled in alive.

A curious collection dedicated to human and animal anatomy and pathology.

Come for the oysters, stay for the priceless art honoring inventors across history and Scotland's favorite outdoor sports.

The wooden house where the jazz great learned to play the piano.

People leave coins atop an unusual grave marker in one of Scotland's oldest burial grounds.

This Scottish castle has witnessed clan rivalries, Jacobite uprisings, whisky smuggling, and more.