The ancient market of Cairo. It is a very colorful place, although the price tags are screwed on foreigners like a cap. On my last visit, I turned to the owner of the store with a request to charge the phone, agreed to provide a chair so that I could sit quietly and wait for charging. He refused to take money for charging the phone.
It is a very colorful place, and it is not purely for tourists, but locals buy there, including this is an Arabic version of the market. I recommend it for a visit.