In the north, on the outskirts of Meknes, which is located between Rabat and Fes, is Volubis, an ancient town of Roman ruins. The Romans were some of the original colonizers to arrive in Morocco and their city is well preserved here. I recommend hiring a guide when you arrive at the front gate to walk you through the ruins, although some are better than others.
Near Volubilis is the town of Moulay Idriss which is known for its hot springs. The owner of Fes' Cafe Clock opened a B&B here called Scorpion House.