Imperial city, founded by Moulay Ismail, Meknes deserves to be visited.
The small medina allows a pleasant stroll in the middle of its narrow streets. Do not miss Bab Mansour square, the mausoleum of Moulay Ismaïl, Heri es Souani (often presented as the stables)...
Half a day during the excursion Fez/Moulay Idriss/Volubilis and Meknes is enough to get an insight into the city. It is also possible to reach Meknes from Fez by train (50 minutes).