Celebrated example of Ottoman architecture that also served as a site for brutal massacres.

These warring psychedelic crags commemorate an unsuccessful military operation.

A war-torn Olympic relic is being overtaken by graffiti and nature.

Oriental bazaar in the heart of Sarajevo.

This historic timepiece is thought to be the only public clock in the world that keeps lunar time.

The remains of the last Bosnian fortress to fall to the Ottomans are still standing.

This cluster of little wooden huts once ground local farmers’ wheat into flour during the days of the Austro-Hungarian Empire.

This unusually shaped mountaintop tower looks like a UFO floating over the city.

During the summer months, giant teddy bears take over Paris near Les Gobelins metro station.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

Paris' linguistic guide to the international language of, yes, love.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

A crucified and bearded female saint.

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

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.

A Jenga-style cylindrical tower of books that appears to go on forever.

Enormous sandstone towers loom within a Czech forest.

Neighborhood in Jerusalem is home to the ultra-orthodox haredim.

The only quarter of the Old City not dedicated to a major world religion.

This daunting 1st century fortress was purportedly the site of one of the most dramatic revolts of the Jewish-Roman wars.

This bridge made famous in a novel and on-screen wasn't actually built over the river Kwai.

This Bangkok high-rise looks like a rudimentary LEGO elephant.

A shrine built to combat the bad karma of a commercial venture.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.