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

Nine centuries-old fortresses guard the walls of this medieval Romanian city.

A fiery crater has been burning in the Karakum Desert since 1971.

Mysterious hillside with a continuously burning natural fire.

A highly symbolic tower in honor of Supreme Leader Kim Il-sung's personal philosophy.

The field of tiny caves that mark this Chinese cliffside are each their own historic Buddhist temple.

A brilliant turquoise lake in the mountains.

An impactful museum ensures notorious war crimes disguised as "medical experimentation" won't soon be forgotten.