Near Belgrade, an ancient-looking sarcophagus serves as a World War I monument.

Different sections of the Zemun Fortress were built in the 14th and 15th century as a response to the advance of the Ottoman Empire.

An Art Deco Icarus statue adorns this abandoned gem of Yugoslav Modernist architecture.

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.

Two buildings named after their windows that make it look like a sea of television sets plastered to a wall.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

A tribute to a man who defied the Nazis until his last breath.

This feat of Brutalist architecture is also known as the Three Sisters.

This spaceship-like Serbian monument reaches for the stars in celebration of the fallen fighters of fascism.

This symbol of Yugoslav liberation decorated with 620 carved heads of mythical creatures is now a forlorn relic of another time.

A solar-powered primary school inspires hope and experimentation in a country ripe for energy innovation.

An abandoned resort in North Macedonia is a relic from the Communist Party of Yugoslavia.

A historical puzzle lies at the origins of this structure.

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

Space-age monument to an early 20th-century uprising.

This historic black and white monastery is one of Bulgaria's architectural jewels.

A striking symbol of the Bulgarian capital.

Ruins of an early Roman Christian church dating back to the 4th to 5th centuries.

This massive stone and steel monument remembers a century-old battle that cost thousands of lives and nearly destroyed the city.

A mountain pass in Bulgaria's Balkan Mountains was the site of four historic battles.

A magnificent, glittering building tucked into a tiny Bulgarian mountain town.

Visitors can still take a train to this former train station turned museum.

This recreated Roman outpost stands above its buried predecessor.