A lost city discovered deep in the Amazon rainforest could unlock the secrets of a legendary tribe.
Little is known about the Chachapoyas, the Cloud People of Peru, an ancient, white-skinned civilisation wiped out by disease and war in the 16th century.
But now archaeologists have uncovered a fortified citadel in a remote mountainous area of Peru known for its isolated natural beauty.
It is thought this settlement may finally help historians unlock the secrets of the 'white warriors of the clouds'.
The tribe had white skin and blonde hair - features which intrigue historians, as there is no known European ancestry in the region, where most inhabitants are darker skinned.
The citadel is tucked away in one of the most far-flung areas of the Amazon. It sits at the edge of a chasm which the tribe may have used as a lookout to spy on enemies.