If you'd like to walk towards the western centre of Berlin, turn right behind Hansa bridge, and after a couple of minutes you'll be at S- Bahn station Tiergarten (another possibility to take the S-Bahn, of course). On the other side of the street you will see the edge of the Tiergarten, Berlin's large central park, offering you many small and wide paths to lead you gently to numerous targets in the city centre (e.g.: Kurfürstendamm and Tauentzienstraße) or to pleasant spots (lakes, beer-gardens etc.) in the middle of the park.