Bizarrely shaped rock formations in northwest Bulgaria come with equally bizarre legends.

An architectural marvel that spans the Arda River, and has stories of a haunted past.

An abandoned brutalist monument whose history has been lost to the ages.

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

A bridge destroyed three times: once as a ruse, then in an actual attack, and finally for the movies.

This abandoned airplane hanger is said to have once been a top secret launch facility.

A forgotten and crumbling Yugoslav monument to the victims of fascism.

This surreal memorial/cemetery is a necropolis of crumbling stonework and puzzle-shaped headstones.

This brutalist monument is inscribed with 9921 names of Yugoslav partisans who perished during WWII.

This abandoned Olympic skiing facility still bears the scars of the Siege of Sarajevo.

Oriental bazaar in the heart of Sarajevo.

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

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

The place where World War I began.

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

This top-secret nuclear bunker hidden in a Bosnian mountain has been converted to a modern art exhibition space.

There's a mini version of Iguazu Falls hidden in the Balkans, and it's got a rope swing.

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

Bridge that died in war and was resurected.

A system of constructed rapids and concrete waterfalls in a linear park on the Slepnya River.

A striking Soviet memorial commemorates the liberation of Belarus from the Nazis.

Remnants of the city's Soviet history hover over this modern fast-food outlet.

The luxurious circular mansion built for a Communist leader now lies abandoned.

Huge stairway leads to this massive gallery.