I’d recommend checking out the UNESCO World Heritage List for Tunisia. But among the array of beautiful sites is the Amphitheater of El Jem, Carthage, Kairouan, the Medina of Sousse, and the Medina of Tunis.
The Amphitheater contains the impressive ruins of the largest colosseum in North Africa, dating to 3rd Century Rome. Carthage is an extensive archeological site containing remnants of several cultures (Phoenicio-Punic, Roman, Paleochristian and Arab). Kairouan is one of the holiest cities to Muslims in Tunisia. Anyone you talk to will know of The Great Mosque, rebuilt in the 9th century. Medina means “city” in Arabic. Both Sousse and Tunis have great historical significance and are worth spending time in. You might recognize the large, intricate doorways if you’ve also traveled to Morocco.