Heidelberg Castle (Heidelberger Schloss), Heidelberg

No trip to Heidelberg would be complete without a visit to the castle. Dominating the city from the brow of the hill, the castle offers breathtaking views over the old town and the River Rhine. It may be worth timing your visit to coincide with the Schlossfestspiele castle pageant or with one of the fantastic firework displays which illuminate the castle several times a year. Built over a period spanning three centuries, the castle developed from being a simple medieval fortress into a splendid Renaissance palace. Regular guided tours are available.