You can go to the city of Tunis (about 45 min enroute), visit the picturesque Medina and go to the Bardo Museum, or continue on the way to the northern suburbs - the ancient Carthage and the picturesque Sidi Bou -Said is for the whole day. And for a half day is worth visiting the city of potters and citrus Nabeul - from Hammamet about 20 minutes by taxi