As a part of a coach tour, we only had about 30 minutes to wander Chellah on our own. I wish we had more time, because there were so many beautiful little crevices to explore. Much less crowded than Volubilis, it was a perfect time to enjoy some quiet exploration and beautiful views. Honestly, although it is the smaller of the two Roman sites, I would recommend seeing Chellah (if you only have time for one).
Also enjoyed the very bold stray cats & chickens that call the place home!