I dunno, did you already know that the ancient Peruvians made hundreds of huge, miles-wide drawings that can only be seen from way, way up in the air, and that we're still finding them? Whatever, I didn't, this is about as weird as it friggin gets.
Repeat, they're *still* finding them.
By flying over them.
In planes.

https://news.artnet.com/art-world/new-nazca-lines-discovery-2231132