Stone henge was erected in the 50s. The entire site was built with cranes and modern construction equipment as a “renovation “ guide books from the 60s and 70s used to explain it and then they stopped printing those. It’s basically a scam. It’s a reinactment of what they “think” it looked like. There’s ruins of stone circles like it all over Britain and other parts of Europe and maybe America. So yes it’s partly is not mostly fake.