Heidelberg, Germany March 9, 2018Travel loghangseepheng The Karl Theodor Bridge (Old Bridge) in Heidelberg, was constructed in year 1788, and it is one of the famous tourist destinations. The Old bridge crosses the Neckar river, connecting the Old City with the Neuenheim district of the city. At Heidelberg Castle, a historical castle, another point of interest/landmark in Heidelberg. View from Heidelberg castle Part of castle structure