These Stalin-era industrial 'death traps' hang lifeless above the city

Underground monastery and fortress.

A scenic canyon with thick forests and historic ruins.

This derelict superstructure was a very important warning system for the Soviet military.

This beautiful natural train tunnel is said to grant the wishes of visiting lovebirds.

The ghost town left by the worst nuclear disaster of all time is being taken over by nature and urban explorers.

Two Chinese dragons guard the caves of this medieval temple in Iran.

One of the largest and oldest caravansaries in Persia.

This ruined fortress was the stronghold for a persecuted medieval leader and his infamous Assassins.

Iran's colorful terraces are a rare geological masterpiece.

The oldest Buddhist monastery in Mongolia has survived centuries of invasions, political shifts, and religious purges.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

Tourists often confuse this beautifully ornate former cigarette factory for a mosque.

A unique hanging cable-car navigates through Dresden, the oldest suspension railway in the world.

These massive moving sand dunes have swallowed an entire village and are still on the run.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

The most metal church of all time was built in record time because of an international, pious pissing contest.

A Lycian city of the dead carved into the hillside of Southern Turkey, complete with startlingly human touches.

A marvel of Byzantine engineering under the streets of Istanbul.

Roman ruins top white travertine terraces formed by ancient hot springs.

This ancient town is full of stunning Ottoman architecture and streets so narrow trash collection is done by donkey.

Hot springs monkey spa in the middle of Hell's Valley.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.