Moscow's imposing monument to the Space Age.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

Immortal combat in a Moscow museum.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A small but immensely extravagant palace built by the "Night King."

The fairy tale castle of the “fairy-tale king,” this was also the inspiration for Disney’s “Sleeping Beauty.”

A fearsome dragon clings to a corner of Munich's city hall.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

Five ancient libraries, little changed for centuries, preserve a medieval archive of Quranic lore and civic documents

The other side is actually green.

The oldest known university in the world is in Fez, Morocco.

Thousands of narrow alleyways in an ancient medieval city make up what's believed to be the world's largest car-free urban zone.

Numerous impressive carvings are embedded in the trees lining this street in Marrakech.

The world's largest ship graveyard is the product of decades of corruption.

This giant statue is the product of a mixture of corruption, Stalinist architecture, and North Korean manpower.

At the very tippity-top of Europe is a cliff from which you can view the midnight sun.

Not quite the cultural gateway between China and Sweden its designer imagined.

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.

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

This chimerical bridge/tunnel appears to dead end right into the sea.

Swedish skyscraper with a 90° twist.