Sounds like a really cool project!
Haven't been to a lot of "weird monuments," save for the "Cadillac Ranch" near Amarillo, Texas... bunch of old Caddy's covered in grafitti, half-buried in the ground. Saw it on the way OUT of Texas, when we left there after having lived there for almost 25 years.
Almost cooler was our former neighbor across the street, here in Washington state. He was originally a ski instructor in Vermont and created about a 150-foot fence made entirely from skis. We called it "Ski Henge," locally.
=^..^=
The Cadillac Ranch sounds really cool! It's actually featured in the comic book too. And who knew there were so many different versions of Stone Henge.
Also, congratulations!!!! You are the winner of the contest. I just need your address so I can send you the prize. Do you have a discord or would you prefer to send it over email?