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

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

Sofia's legislative center is continuously reinventing itself.

A striking symbol of the Bulgarian capital.

Eastern Bloc nostalgia, anybody?

A graceful natural rock formation stands astride the point where the Gulf of California meets the Pacific Ocean.

Yugoslavia's biggest underground airport lies in ruins.

Curious carved stones and bird-like wings are a symbol of Serbian resilience and freedom on the site of a WWII massacre.

The unusual sculptures are believed to be powerful political symbols.

A museum dedicated to the former country.

A Serbian church lit by chandeliers made of weapons.

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

A misnamed well, with a deep dark past.

A pair of connected skyscrapers form this symbolic gateway.

Built as an anti-fascist tribute, this surreal Yugoslav memorial became an unwelcome symbol after the Croatian war for independence.

A tower marking the spot where Yugoslavia began its resistance against the invading Nazis stands neglected, but not quite forgotten.

Serbia's master of striking memorials erected a forgotten, hidden gem in the hills outside a tiny village.

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

This huge metal monument is slowly being stripped to its concrete skeleton.

Controversial site of what could be Europe's first pyramid.

This museum preserves the hand-dug tunnel that kept Sarajevo afloat during the Serbian siege.

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

The place where World War I began.

This historic cemetery was inaccessible for several years due to dozens of land mines.