The first mosque in the world to receive electricity.

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

The place where World War I began.

Oriental bazaar in the heart of Sarajevo.

A monument on the pavement marks the spot where two cultures that shaped Sarajevo come together.

An ancient knight and a symbol of the city's freedom.

Gargoyle head that brings good luck.

Once called the "Polish Gold Coast" it is an icon of the neighborhood that bears its same name.

The twin towers in this Chicago fountain use 50 foot tall video screens to spit on people.

This massive stained-glass masterpiece is thought to be the largest Tiffany dome in existence.

A 11-foot former president stands on a Kosovo street that also bears his name.

This stone figurine was made more than 6,000 years ago and depicts a female deity of the Neolithic Vinča culture.

This massive monument was unveiled the day Kosovo declared independence from Serbia.

An unfinished Serbian Orthodox church with 1,389 golden crosses planned to represent the Battle of Kosovo.

A futuristic, brutalist masterpiece that is also strangely prison-like.

Memorial to the victims of the Holocaust in Serbia.

The unusual sculptures are believed to be powerful political symbols.

A towering spire in the fortress of Kalemegdan honors the victorious armies of Serbia during their struggles against the Ottoman Empire.

Arguably Belgrade's only example of pure Art Deco architecture.

A vast Communist-era exhibition space in the Bulgarian capital.

Sofia's legislative center is continuously reinventing itself.

The famous sculptor had a hand in this imposing fortress.

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

A striking symbol of the Bulgarian capital.