The best way to explore a new city is always on foot. Based on prior trips to Europe, I knew that Sandemans offers great walking tours. So while in Berlin, we made it a point to reserve a spot on their FREE city tour. The tour is the perfect introduction to Berlin and helps you orient yourself to navigate the city. The tour is offered in English and Spanish at four different times daily, each one lasting about 2.5 hours. A lot of people sign up, so make sure you book in advance to ensure a space. On our tour, about 100 people showed up and we were quickly divided into smaller groups of 20-30.