UNESCO listed the Upper Middle Rhine Valley - one of the oldest and most impressive natural landscapes in Germany - as a World Heritage Site in 2002. Between Binge and Koblenz, there are no fewer than sixty castles and palaces majestically overlooking the Rhine. On both sides of the river rise steep vineyards used to produce the famous Riesling wines. Further downstream in North Westphalia, cyclists can choose which bank to ride on. On the right bank is Königswinter, the most visited mountain in Germany, while on the opposite bank, the trail passes through the old government quarter in Bonn, with its cathedral, Baroque town hall and the house where Beethoven was born.