You know, it upsets some, but all their famous pyramids, cities like Machu Pichu etc were covered in dirt and vegetation, and looked like hills to them until white explorers and archaeologists discovered them, uncovered them and returned them to what we see today.
Now they go out of their way to act snooty to us and tell us how sacred they are, and how our presence profanes them.
The Sahara, too, is giving up its secrets to satellite and LiDAR. Makes sense that 6,000 years ago folks lived there in what was a fertile Savannah at the time.