4 days in Tunis after an impressive time in the South

Hello everyone,

I have spent a week in South Tunisia and the day after tomorrow I'm heading north to Tunis to spend some days there as well. I am seeking for advices or any kind of recommendation from people who have lived there and can suggest places (non-touristic as well) that I should not miss. As I won't have a car, I'm wondering if there are somewhere available timetables and routes of city busses. Do not hesitate to pm me.

Best,