A large labyrinth lies in the midst of Peru's Nazca Lines, according to the most detailed study on the enigmatic desert etchings created between 2,100 and 1,300 years ago.

Completely hidden in the flat and featureless landscape, the labyrinth was identified after a five-year investigation into the arid Peruvian coastal plain land, about 250 miles south of Lima, where the mysterious geoglyphs are located.

"As you walk it, only the path stretching ahead of you is visible at any given point," Clive Ruggles of the University of Leicester's School of Archaeology and Ancient History, said....