The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

Museum dedicated to the terror regimes of Hungary.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A series of caves under Castle Hill that once held the prisoner Vlad Tepes, better known as Count Dracula.

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.

This Budapest bar allows drinkers to leave their mark on the walls, floor, and even ceiling.

The only tower of an aerial tramway standing over a ski-lift.

Sweden's oldest animated sign is still lighting up the skyline today.

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.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

The television series' iconic giant foot was borrowed from this classical painting.

London's smallest police station is barely the size of a phone booth.

The last four extravagant street signs of London's historic banking street.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

On October 17, 1814, a 15-ft. wave of beer ran rampant through the streets of London.

After nearly 60 years, there's still a bear at Paddington Station looking for help.

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

Over 3km of caverns and caves at the Switzerland-France border contain the largest underground river in Central Europe.

Natural history museum displaying a famous taxidermied St. Bernard.