On our second day in Heidelberg we went on a tour of the old town. Unfortunately, we were so engrossed in all the information that we forgot to take a bunch of pictures. The tour ended in the old student prison that held the "bad" students from the old Heidelberg university. Later in the evening we stayed up late for the castle illumination. We were fortunate enough to be there on one of the three days in the summer that they hold the castle illumination. Around 11 PM they have fireworks and illuminate the castle to resemble the time when the French burned the castle down over 300 years ago.