Immortalised through the famous Humphrey Bogart and Ingrid Bergman movie and forever associated with honorary citizen Sir Winston Churchill, Casablanca is a vibrant metropolis, a blend of western modernity and Arabic tradition. The most important tourist attraction is the awe-inspiring Hassan II Mosque - one of the largest in the world and the largest in Morocco, and with the tallest minaret on the planet. It is one of the two main mosques in Morocco open to non-Muslims. It has a beautiful interior completed with water features, a roof that opens to the sky and beautiful tile work. Other interesting sights are: the Old Medina - a small traditional walled town in the north of Casablanca, and the Shrine of Sidi Abderrahman - built on a rock off shore, accessible only at low tide. The shrine itself is off-limits to non-Muslims, but visitors are permitted to explore the tiny, medina-like neighborhood that has sprung up around it.