The landing strip theory is a fun one but I think it sells the Nazca people short, honestly. We're essentially saying ". This is too impressive for ancient humans to have done without alien help" - which is a bit of a backwards assumption when you think about it.
That said, I don't think you're entirely overthinking it. There's something genuinely strange about the scale. The figures are only really coherent from altitude, which raises obvious questions.
My own leaning is toward the ley line / ceremonial energy pathway interpretation. I've spent years mapping ley convergences across Cheshire and the geometry involved in ancient sacred sites follows eerily similar logic - long straight lines connecting points of spiritual significance. The Nazca Lines fit that pattern beautifully. They weren't runways, they were ritual roads. Possibly tied to water sources and astronomical alignments too.
The hummingbird and spider figures might be constellation maps overlaid onto the landscape itself - the earth as a mirror of the sky. That's a concept that turns up in cultures worldwide.
What drew you to the landing signal idea specifically? Was it the straight lines, or more the sheer scale of the whole thing? Because I think those two elements actually have quite different explanations when you pull them apart.
Would love to hear what others reckon. @ModeratorMike is there a dedicated Nazca thread somewhere in the archives? Feel free to merge if so - this deserves a proper deep dive discussion.