Have you ever heard of this geoglyph before?
It can be seen on Google Maps, by the way:
cerro unitas chile - Google Maps
I'm kind of wondering, again, why would these people build such structures if they couldn't truly see them from above.

Atacama Giant - Wikipedia, the free encyclopediaThe Atacama Giant (Spanish: Gigante de Atacama) is a large anthropomorphic geoglyph in the Atacama Desert, Chile. Located at "Cerro Unitas", this is the largest prehistoric anthropomorphic figure in the world with a height of 119 metres (390 ft) and represents a deity for the local inhabitants from 1000 to 1400 CE.
The figure was an early astronomical calendar for knowing where the moon would set; by knowing this the day, crop cycle, and season could be determined. The points on the top and side of the head would say what season it would be depending on their alignment with the moon, which was very important in determining when the rainy season would come in the barren Atacama.
It can be seen on Google Maps, by the way:
cerro unitas chile - Google Maps
I'm kind of wondering, again, why would these people build such structures if they couldn't truly see them from above.