The landing strip theory is pretty much cooked at this point, the lines aren't flat or hard-packed enough to actually land anything on and the widths are all over the place. But I still think people are too quick to just go "ritual purposes" and call it a day, like that's somehow a more satisfying answer when we genuinely don't know.
What gets me is the sheer scale of it. You don't need to see them from the air to make them but someone clearly had a vision that went way beyond ground level. Maybe not aliens, maybe not aircraft, but something about that civilisation understood perspective and geometry in a way we haven't fully worked out yet.
Anyone looked into the acoustic theories? I've been down a rabbit hole lately about how certain ancient sites might have had sound-based purposes and the desert geography around Nazca seems like it could be relevant. Probably clutching at straws but at this point anything's more interesting than "we don't know, probably religious."
