Immense lines carved into the ground covering hundreds of square kilometres. What do they mean?
(01:26)Discover how these huge and mysterious shapes, taking days of labour in burning heat, were constructed.
(02:47)The robotic helecopter builds a 3D photographic map of the mysterious Nasca Lines.
(02:49)What do a Killer Whale, a Spider and a Monkey have in common?
(02:58)