Start your day by visiting the Buda Castle, a UNESCO World Heritage Site, and explore the historic Castle Hill. Take a stroll through the Fisherman's Bastion, a neo-Gothic terrace with panoramic views of the city. Visit the Matthias Church, a stunning 14th-century church with colorful tiled roof. In the afternoon, take a relaxing dip in the Gellért Baths, one of the most famous thermal baths in Budapest.