In southern Peru lies one of mankind's greatest mysteries - 1000's of giant shapes etched into the desert sands. We reveal who made them and why. Etched, as if by giants, onto the arid moonscape of Peru's southern desert lies one of man's greatest mysteries; the Nasca Lines. More than 15,000 geometric and animal-like patterns have been discovered criss-crossing the pampas like a vast puzzle. Who built them and what... see more