Unusual building appears to be haphazardly built from randomly piled bricks.

Remnants of successive wars and Muslim colonialism in the 11th century.

An abused and forgotten metropolis, abandoned for centuries.

The first skyscraper to include a Ferris wheel built into the facade.

A gleaming white and undulating tower marks the border between Georgia and Turkey.

A Turkish monastery tucked into a cliff wall.

A collection of art from Bulgaria's time as a communist state.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

A striking symbol of the Bulgarian capital.

Over the centuries, this island paradise has done it all, from providing monks with ecclesiastical respite to sheltering an exiled Leon Trotsky.

A meow-velous tribute to a beloved street cat, made famous on the internet.

The home-turned-museum of Barış Manço, the mustachioed Turkish Elvis for children.

Ancient serpentine sacrifice holder that has stood the test of time.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

A fountain standing as a testament to a doomed alliance.

A small etching on the white marble parapet was written in runic script by a Viking mercenary.

This museum was invented in a novel before being made real by the author.

A whimsical bridge adorned with decorative dragons.

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

This abandoned Slovenian military barracks has become a punky-political art squat.

An eerie, existential museum dedicated to the author of "The Metamorphosis."

A bust of Franz Kafka spins in pieces, reflecting the writer's inner torment.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Synagogue built from the stones of Solomon's temple contains the golem of Prague.