Beyond the sandy beaches of Tunisia’s crowd-pleasing Mediterranean Sea resorts (Hammamet, Monastir, Sousse, and the paradisaical island of Djerba) lie the country’s marvellous historic monuments, such as the well-preserved Roman amphitheatre of El Djem or the ruins of once almighty Carthage, whitewashed domes, busy souks and vast expanses of the sprawling Sahara.