NAZCA

The Nazca Lines were created by between 400 and 650 AD

My opinion
However I never been there before, but I have some basic question remind deep in my heart. Why the Nazca lines never been covered by sandstorm or just a layer of dust after thousand of years? Do someone go clean up the dust out of our radar? There are some scholar went there and experiment by creating their own Nazca line, but within a month or a year the line gradually and end up bury by the sand.