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

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

The Art Deco artwork depicts gilded carriers of deadly illnesses.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

A pair of club-wielding guardians stand watch over London's first public clock to feature a minute hand.

The world's oldest optical museum is an odd collection where the exhibits look at you.

A naturally beautiful, seemingly bottomless deep blue spring.

In between two buildings in Ljubljana, medieval tunnel to nowhere.

Colorful power station with a chimney equipped with a gallery for exhaust monitoring equipment.

Slovenia's first mosque is a striking mix of Islamic and modernist architecture.

The Slovenian architect designed many landmarks in the capital city, including his own dream house.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

A whimsical bridge adorned with decorative dragons.

A relic from the Industrial Revolution got a second life as a contemporary performing arts space.

Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

Once a state-of-the-art tuberculosis treatment spa, these ruins are now ruled by paintball players.

Two distorted Romanesque columns hold aloft a mine cart in honor of laborers who died during WWII.

This abandoned prison was so notorious that its name has become a metaphor throughout Albania.

A marvel of technology a century ago, this disused power station now offers a lovely glimpse into the industrial design of the past.

The oldest private art gallery in all of Hungary.

The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

Electrical curiosity museum housed in an old transformer station.

A forgotten graveyard lost in the tangles of an overgrown garden.

This quaint Hungarian railway system is operated exclusively by children between the ages of 10 and 14.