Went to see some rock tombs, and I thought to myself, how did people even manage to build that? Not only it's HUGE, but it's built on steep mountains, and they carved the tomb out of the rocks...

And the more I see, the more I think people in the past mastered way better skills than the modern ones, yes you built airplanes, the internet, and many cool techs, but the knowledge of how to live in harmony with nature or how to make the most of natural material is going downhill.