Take advantage of the rainy weather to explore the historic district of Islamic Cairo. Wander through the narrow streets and discover the beautiful mosques, such as the iconic Al-Azhar Mosque and the Sultan Hassan Mosque. Visit the bustling Khan El Khalili market, where you can browse through a variety of shops selling traditional crafts, spices, and jewelry. Don't forget to try some delicious street food along the way, like falafel or koshary.