This London plaque marks the spot where David Bowie's famous alien made his debut.

Giant, friendly pelicans in Central London, the most unlikely of places.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

Eighty million natural history specimens call this gargantuan museum home.

An incarceration museum on the spot of possibly the oldest prison in England.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

Hear the quietest sound from across the dome.

The curios of pharmacist and collector Henry Wellcome.

A kaleidoscopic warehouse-maze of handmade neon signs.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

One part local history, 99 parts gruesome haunted house.

A 250-year-old timepiece-automaton adorned with golden mechanical birds, which still sing to this day.

Palace where the nearly un-killable Rasputin was murdered.

This newly renovated Soviet-era outdoor exhibition center is bigger than the principality of Monaco.

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

Former headquarters of the KGB.

Moscow's imposing monument to the Space Age.

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

Museum celebrating the achievements of the Soviet space program.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

A 125-meter long "tribute to the Brazilian people."

This massive Brazilian church is built like an angular, technicolor pyramid left by Mayans from the future.

This Brazilian palace island was once the site of the last grand ball before revolution.

Plagued by riots, celebrity injuries and a tragic death, this amusement park has been demolished.