Interesting find-
ill see if i can find it but there is an obelisk made of a type of iron that somehow doesn’t rust and has been standing in the elelemts for a very long time- (not sure if it was you that posted about it? Mighta been?)
Delhi. I’m pretty sure there was a topic about it, but I’m getting sleepy, sooooo...
https://search.brave.com/search?q=iron+pillar+in+india&summary=1