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

Thirteen sculptures in central Moscow graphically depicting vices of the modern world.

This abandoned Soviet circus is slowly being restored to its Communist-era glory.

A monument to Lenin has been transformed into a statue of everyone's favorite black-helmeted, fool-choking Sith Lord.

The largest catacomb system in the world.

Crumbling necropolis set high above Fez.

Place with alleged mystical powers in Old Orthodox Church in Sarajevo.

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

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

Berlin's old airport.

A collection of abandoned typographic signs from Berlin and beyond.

The most visited, and possibly most controversial, museum in Germany.

European castle ruins in an American state park are actually the product of death and grief.

66,000 pieces of art, donated by one of the world's richest men.

A jaw-dropping "megalibrary" that turns book-browsing into a geometric adventure.

Yugoslavia's biggest underground airport lies in ruins.

Standing proud atop a Turkish bluff, this Ottoman palace has retained its grandeur despite being abandoned for centuries.

Unfinished monument to peace between Turkey and Armenia, long divided by a dispute over genocide.

An abandoned saucer-shaped monument in the Bulgarian mountains.

Once described as the "Eagle's Nest," this ruined ancient city rests on a remote mountaintop.

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

A pair of connected skyscrapers form this symbolic gateway.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

Turkish adventurer antiques in the heart of the Grand Bazaar.