A maze of underground tunnels beneath one of the most beautiful forts in Serbia.

Religious perseverance and cultural coexistence manifest in an architectural gem that multiple wars couldn't topple.

A grand Yugoslav memorial to the group of partisans who fought and died resisting western Serbia’s Nazi occupation.

A pair of connected skyscrapers form this symbolic gateway.

A Serbian church lit by chandeliers made of weapons.

This memorial park stands on the site of one of the largest mass executions of the Second World War.

A sinuous path among steep cliffs creates a stunning sight in southwestern Serbia.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

A temple dedicated to the 13th-century Alevi Turkish dervish credited with bringing Islam to the Balkans.

A museum dedicated to secret surveillance.

Bronzes and busts that once stood in the city's main squares are now relegated to a small hidden courtyard.

Once the fallout shelter of a dictator, this sprawling bunker is now a combined history museum and contemporary art gallery.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

A naturally beautiful, seemingly bottomless deep blue spring.

This unusual hostel provides a glimpse of life in a city under siege.

Two bulls enter. One leaves a champion—but neither loses its life.

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

A field filled with carved medieval tombstones called stećak.

This picturesque monastery at the base of a cliff is a peaceful oasis open to all visitors.

A wellspring of natural Viagra found in Bosnia.

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.

This ironic war memorial thumbs its nose at a campaign of inedible humanitarian aid food products.