Sofia's legislative center is continuously reinventing itself.

"Holy Wisdom" overlooks the city that became its namesake.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.

Romania's triumphal arch looks out over Bucharest.

This once-derelict building is now one of the most beautiful bookstores in the world.

The unusual sculptures are believed to be powerful political symbols.

This enormous abstract sculpture is part jungle gym, part elaborate noise-making machine.

A former bank seized as a sniper vantage point during the Bosnian War is now a secret graffiti art gallery.

Oriental bazaar in the heart of Sarajevo.

The first mosque in the world to receive electricity.

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

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

A number of craters left by fatal mortar strikes have been filled with red resin to remember those lost during the Siege of Sarajevo.

This one-time health resort was used by aristocrats around the world.

A whimsical bridge adorned with decorative dragons.

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

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

The haunting ruins of a military fortress turned astronomical observatory sit on a Sarajevo mountaintop.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

A musical instrument played by the sea.

At the right time of day, sunlight floods through the roof of this cave and illuminates the small pavilion hidden within.

Six times a day a train runs right through the middle of this Thai street market, sending vendors scrambling.

A meditative walk up 353 stairs leads to a majestic white Buddha overlooking Pai.