Photo: Wikimedia CommonsThe medieval Citadel of Saladin crowns a rocky spur above Cairo, its walls enclosing the grand Ottoman-style Mosque of Muhammad Ali with its silver domes and soaring minarets. From the ramparts the whole city spreads out to the distant pyramids. Wear comfortable shoes for the climb and cover your shoulders and knees. Come on a clear day for the view, and step inside the alabaster mosque for its glittering interior.