Longest pre-columbian line

The Nazca lines are a series of enormous shallow grooves running across an expanse of desert in southern Peru called the Nazca Plain. These grooves intersect to yield over 70 geometric figures, including representations of birds, a spider and other animals, but, remarkably, these figures can only be discerned when viewed from the sky – they are too huge to be perceived as shapes when viewed on the ground. Dating back to somewhere between 300 BCE and 540 CE, their origin and purpose remain a mystery. The longest single Nazca line measures 14.4 kilometres (9 miles).