Art and a pun, all in one.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

The most visited, and possibly most controversial, museum in Germany.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

A naturally mummified 2,000-year-old man.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

Rebuilt remains of a temple to Roman god Mithras.

Hear the quietest sound from across the dome.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This Hungarian castle was built out of cardboard and wood until it proved so popular that it got upgraded to stone.

Gargantuan home of Russian science.

A 360 degree battlefield experience.

Stalinist skyscraper built with help of cryotechnology.

The tallest hotel in Europe.

Its front wall is striped with a menagerie of fantastic beasts and magnificent monsters.

Moscow's imposing monument to the Space Age.

World's largest bell sits on the grounds of the Kremlin in Moscow.

Former headquarters of the KGB.

A sculpture park of the tossed aside relics of the USSR, from Stalin to a massive Soviet emblem.

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

Immortal combat in a Moscow museum.

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.

A bit of retro transportation flair preserved in the world's largest department store.