In 1952 I was riding in a B-25 across the High Plains somewhere around the Texas-New Mexico border when I spotted this large fish-shaped pattern on the ground, outlined in black and having a couple of circles with straight black lines about the quarter points. I had recently read a National Geographic article about some similar prehistoric marks somewhere in the Southwest. I got excited, believing it was authentic Native American, and started to point out my “discovery” to the two fellow passengers sharing the waist seats on the deck of the old B-25. One of the guys, a WW2 Air Force veteran, said “Why, that’s just an old battleship target!”
Heh, that’ll give people something to wonder about in a couple of thousand years. :’)