Zurich's Old Town, also known as Altstadt, is a charming neighborhood with narrow streets, historic buildings, and a vibrant atmosphere. On a rainy afternoon, take the opportunity to explore the cobblestone alleys and discover the city's rich history. Visit the Grossmünster, a Romanesque-style Protestant church with stunning views from its towers. Wander through the medieval streets lined with boutique shops, cafes, and restaurants. You can also visit the Lindenhof Park, a peaceful green space with panoramic views of the city. Rainy days add a certain charm to the Old Town, making it a delightful place to explore.