Attracting even the locals on occasion, this boat tour of Berlin's many bridges is great, wholesome fun. One can hop on and hop off at many sites throughout the city, making it a good activity to integrate at any point of a walking tour through the city. Just look for the "Reederei-Riedel" signs. Total duration of the round trip is 180 - 210 minutes.
Am Köllnischen Park, Berlin, Germany