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

A pair of connected skyscrapers form this symbolic gateway.

A musical instrument played by the sea.

When a supermarket opened up shop within a medieval building it became protected by UNESCO on a technicality.

Oriental bazaar in the heart of Sarajevo.

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

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

A 11-foot former president stands on a Kosovo street that also bears his name.

This massive monument was unveiled the day Kosovo declared independence from Serbia.

Structure built from the skulls of vanquished foes.

A futuristic, brutalist masterpiece that is also strangely prison-like.

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

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

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

One of the most photographed locations in the entire city.

An abandoned Byzantine fortress and notorious prison.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

An homage to the medieval rulers of Bulgaria.

A decaying, yet still functioning, work of communist architecture.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

Romania's triumphal arch looks out over Bucharest.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

A forgotten remnant of the Soviet Union, Transnistria is an unrecognized country hidden behind a heavily militarized border between Moldova and Ukraine.

Featured in one of the most iconic scenes in cinema history.