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

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

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

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

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

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

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

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

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

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

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

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

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

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

These warring psychedelic crags commemorate an unsuccessful military operation.

This small shrine is dedicated to the designer of the first Russian fighter jet and his brother, who became Chairman of the Presidium of the Supreme Soviet.

Armenia's premier center of astrophysical research was established during the Soviet era.

The observation point offers spectacular views of the ruins of an ancient Armenian capital.

This little medieval church hidden in the center of Yerevan was lost and rediscovered—twice.

This medieval manuscript collection has some of the most obscure and ancient texts in the world.

The ruins of a medieval monastery built on a perilous slope.

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

The world's longest nonstop reversible cable car soars through spectacular scenery to the medieval Tatev Monastery.

After visiting hours, this picturesque waterfall is essentially turned "off" to be used for hydroelectric power.