Morocco is two extremes. I learned and saw that the bigger developed cities are sectioned off with old and new quarters separated by castle-like walls into parts: traditional old world (medinas) and new (“nouvelle villes”) cities that boasts modern day lifestyle.
Nouvelle villes are the French built section of the cities and tend to have a more westernized aesthetic (some say colonialized appeal). The architecture is quite impressive. The Moorish arc is the country's emblem. There are huge gates/walls with the arc that usually separates the old and new cities. Once you see that arc, it's a sign that you're entering/leaving the medina.
Gueliz is a very prominent and modern neighborhood. Complete with all the plush amenities (a la cyber cafe and high end establishments) and westernized influences (McDonalds, Pizza Hut, KFC, Zara, etc.). It's well worth a visit to see the stark contrasts between one of Morocco's oldest cities and 'new' neighborhood.