I had a few hours left in Berlin and rented a bike for a little stroll around the city. It was a great ride visiting sites I didn't have the chance to see before. Actually the guy who rented the bike was really nice. Not sure if he has the best price as I didn't get to shop around but it was near the hostel I was staying and even though I only rented it for 3 hours, he was very flexible with the time (an hour late was fine) I have to return the bike. He also owns a small cute cafe and its where I rented the bike. Overall it have been great fun!