Seen this theory floating around for a while and honestly its more plausible than a lot of people give it credit for. The Nazca plateau gets almost no rain but theres decent groundwater underneath, and some researchers reckon the lines actually follow the underground aquifer routes. Like a massive map of where to dig.
What gets me though is the sheer scale of it. If it was just practical irrigation planning you'd expect something a lot more... functional looking? Not giant hummingbirds and spiders. So either it served multiple purposes or the "irrigation map" angle is only part of the picture.
Been reading a fair bit on this lately and the work by David Johnson on the aquifer connection is worth digging into if you havent already. Not everyone buys it but he makes a decent case.
Anyone here actually been to Nazca and seen them up close? Curious whether standing on the ground there changes how you read the whole thing.