A beautiful but deteriorating monument of Soviet architecture.

A vast and unlikely aviation museum kept alive for over 50 years due to one man's tenacity.

Ruins of a former government building destroyed during the Georgian-Abkhaz war in the wake of the fall of the Soviet Union.

Croatia's towering concrete blossom grows from the site of a World War II concentration camp.

Formerly Yugoslavia's "forbidden island," this sleepy little city still holds the abandoned remains of military strongholds.

Once a state-of-the-art tuberculosis treatment spa, these ruins are now ruled by paintball players.

This abandoned secret city is a crumbling wonderland of Soviet ruins.

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

This stunning, out-of-the-way Croatian monument commemorates a community's uprising against occupying fascist forces.

These warring psychedelic crags commemorate an unsuccessful military operation.

This huge metal monument is slowly being stripped to its concrete skeleton.

The only gulag ever to exist in socialist Yugoslavia.

Just another terrifying garden filled with hundreds of endlessly smiling doll people.

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

Gargantuan home of Russian science.

A sculpture park of the tossed aside relics of the USSR, from Stalin to a massive Soviet emblem.

Moscow's imposing monument to the Space Age.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

This impressively complicated radioastronomy research center was once a tool of Soviet spies.

The industrial monstrosity known as Bagger 258 is a colossal mining machine built in the DDR - but now left for dead in a German field.

Berlin's old airport.

3,000 market stands in five former Zeppelin hangars.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A decommissioned submarine base makes a great space for graffiti art.