It's not clear exactly how many Nazca Lines there are, but they number in the thousands, with new geoglyphs continuing to be discovered with the help of AI.
Scientists have been debating this question since the lines were first formally investigated in the early 20th century. Although the definite answer remains unknown, experts have proposed various reasons for the famous geoglyphs.
More Nazca Lines, including one that looks a bit like a person. (Image credit: Jim Dyson via Getty Images)
Different perspectives
A vast array of theories for the lines' uses have been proposed over the years, with the most outlandish of these suggesting that they were sites for aliens to land spaceships.
"The question of why the geoglyphs exist is difficult to answer, given that we lack any type of preserved oral or written testimony," Karsten Lambers, an art history professor at the University of Augsburg in Germany, wrote in an essay published in the book "Los geoglifos: imágenes y escenarios en el desierto de Nazca y Palpa [The Geoglyphs: images and settings in the desert of Nazca and Palpa]" (University of Augsburg, 2017). It's possible that the uses for the geoglyphs changed over time, he added.
In a 2026 study, researchers noted that some of the earlier Nazca geoglyphs were constructed on hillsides, seem to be located on trails, and "were visible from considerable distances." This means the geoglyphs may have been used to mark travel routes and indicate areas that were good for temporary camps. The team suggested that the markings became places for gathering and feasting.
A geometric-shaped geoglyph from Nazca; the geoglyphs vary in size and shape and may have had different purposes. (Image credit: UCG via Getty Images)"The results suggest that the geoglyphs, as a whole, certainly cannot be interpreted as a calendar system," the team wrote. However, this doesn't discredit the idea that the Nazca Lines had an astronomical significance, Christiane Richter, a researcher at the University of Applied Sciences in Germany and first author of the 2021 paper, told Live Science in an email.
Offerings such as ceramics, crabs, corn and earrings made from Spondylus shells (a genus of bivalves known as thorny oysters) were also placed on low rock platforms near some of the geoglyphs, especially those shaped like trapezoids, Lambers noted in his paper. Spondylus shells are normally found farther north, in Ecuador, but during El Niño events, they can appear farther south, in Peru. These shells, alongside crabs and corn, tend to be associated with water and fertility, Lambers noted.
Related mysteriesAnother idea is that the geoglyphs themselves may have been used for ritual processions. Some of the geoglyphs are made with a single, uninterrupted line," Nieves said. "Those are the ones that would lend themselves for processions since people could walk them in a single file."
Whatever the reasons for their construction the Nazca Lines are awe inspiring today. Lambers wrote in his essay that the Nazca people who built them "succeeded in transforming one of the driest deserts in the world, over the course of many centuries, to serve the region’s inhabitants as an expression of their cultural ideas and a setting for their social activities."
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