Exploring the Mysteries of the Andes May 7, 2015 1000 × 750 Exploring the Mysteries of the Andes Nasca: Geometric Paths The so-called “alien runway” at Nasca stretches for over a kilometre and yet, in Nasca terms, it is quite unremarkable. The purpose of this huge pathway is unknown. © Robin Heyworth – Photo taken 15th March 2002