The idea of renting a bike from the Griebnitzsee Station sounded good, because we would spend some additional time riding. But that additional time took away from the time we could have spent in Sansouci Park or in Potsdam town. So, I would recommend getting bikes at the train station. Also, the bike ride to Potsdam was pleasant and easy to follow, but coming back, we got confused and lost and it really spoiled the day. The map they provide is not great. The audio tour is NOT worth it. After we listened to a few, we just gave up. The English speaker is horribly boring. We also had to wait a while for our bikes, and they weren't in the best shape. On the other hand, biking is a great way to see Sansouci.