Old Porvoo, a charming medieval town with cobblestone streets and colorful wooden houses, is a must-see in Finland. Accessibility can be a challenge due to the historic nature of the streets, but the main areas are generally manageable. It's suitable for both solo explorations and guided tours, the latter offering deeper historical insights. While open year-round, winter can be particularly beautiful with snow-covered landscapes, but be prepared for icy conditions. Expect to spend approximately 2-4 hours exploring, with costs varying depending on dining and shopping choices. Keep in mind that some smaller shops might have limited hours, especially during the off-season.