1. The Nazca lines

2. My theory
Some researcher's have suggested that the lines are symbol of different clans that lived in the area.
Some pictures show this
Maybe al be wrong

3. Where can the Nazca lines be found
In southern Peru they were designated as a UNESCO World Heritage Site in The high, arid plateau stretches more than 80 km (50 mi). As a plane soars over the high desert of southern Peru, the dull pale sameness of the rocks and sand organize and change form.

4. Web sites
Nazca Lines –- National Geographic
Who Made the Nazca Lines