In Peru, among the Nazca Lines (first documented in 1553 by Pedro Cieza de León) are a series of spiral-shaped holes which have baffled researchers for years. Nobody was quite sure what function they served or why they were built. People have taken many guesses over the years, but nothing could ever be proven.
However, there have been some very exciting recent breakthroughs. It is now believed, thanks to new satellite imagery of the area, that the secret behind the holes has finally been revealed.
According to a report by the BBC, the holes served as part of a hydraulic system that was used to retrieve water from underground aquifers. In other words, they were very sophisticated wells that provided water to people in the region which is known for it’s extremely harsh climate.
The researchers in charge of the study were quite impressed due to the fact that operation of these spirals would have taken a considerable amount of organization and knowledge. That’s quite impressive considering they are estimated to be between 2000 and 2500 years old.