This mountaintop beacon is only lit three times a year but shines like some kind of all-seeing eye.

A vintage video game wonderland in downtown Reykjavik.

This verdant, tree-lined Reykjavik graveyard is both enchanting and eerie.

This tiny museum's sizable collection is jammed into a former underground public toilet.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

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

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

The "lost friend” is the most famous of the six moai statues that were removed from Easter Island.

This intricately carved and hilariously huge bed was such a famous symbol both Shakespeare and Byron used it in their writing.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Revel in the Victorian splendor of the world's oldest eating establishment inside a museum.

The longest living non-clonal organisms on Earth.

The arch that celebrated the completion of the Lincoln and Victory highways.

Outside a Viking museum sits a modern-day runestone made by a Swedish runemaster using traditional methods.

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

Now a hotel, this former bank was the site of a robbery that spawned a psychological phenomenon.

A plaque marks the house in Stockholm where the French philosopher René Descartes lived up until his death.

Stockholm's deepest subway station is also a stunning ecological wonder.

An ancient Viking runestone hidden in plain view in Stockholm's old town.

The second-largest collection of runic calendar staffs in Sweden.

The second oldest anatomical theater is housed in a museum of curiosities.

A large collection of ancient runestones decorates this university courtyard.