Ait Ben Haddou. Unesco World Heritage. It's one of the 'must do' visits in Morocco. try not to go there from April to End of May as too many people. And take a guide, your time and interest. If you don't have those, just take a pic from far away, but that would be a pitty. By the way, this is not a Kasbah, it's a Castle, with loads of Casbah's inside. And not all is old. Some parts are left overs from filmsets.