Casablanca's essential sights cluster around two very different faces of the city. The Hassan II Mosque dominates the skyline, and stepping into its vast interior courtyard reveals ocean views and some of the finest craftsmanship in Morocco, best appreciated on a guided tour that explains the intricate zellige and cedar carving. Nearby, the Old Medina offers a compact, walkable contrast with narrow lanes and everyday market life, while Place Mohammed V anchors the colonial-era downtown with grand French Protectorate architecture. Together these picks let a short visit cover the modern religious landmark, the historic core, and the civic center without wasted time.