I'm planning a trip to Berlin and would love to explore the city on foot to learn more about its history, culture, and major landmarks. I've heard that a Free Walking Tour can be a good way to get an overview of the city, but I'm curious about what the experience is actually like. How long do these tours usually last, and are they suitable for someone visiting Berlin for the first time?https://originalberlintours.com/tours/free-original-berlin-walking-tour/