The better way to discover Berlin is rent a bike an run over the town. The chiepest bike rental in Prenzlauer Berg is Prenzlberger Orange Bike (about 6 euro for 24 hours). This bikes are not very light but if you are muscled or if you have a low budget is perfect! If you want to be sure to find an available bike, go early in the morning.
Opening Times (April - October): from Moday to Saturday 12:00 - 18:00