"Mysterious"? This can mean only one thing: They exist to keep the Old Ones locked up!

> This purpose, the researchers believe, is sacred – designed as part of a pilgrimage to Cahuachi, the ceremonial center of the Nazca culture, which overlooks some of the glyphs from high perches atop mounds.

Just some of the glyphs? Then what about the rest? Someone(s) put in a lot of time and effort, and other-than-some wouldn't have been seen?