The Danube might have many colors, but blue is not the most common one. A constant, wide and powerful presence through the city of Budapest, the Danube calls for a (touristic) romantic-candle-light-dinner-cruise. Only then, the Fekete-Duna (black-Danube) shows its shiny face.
Danube East side gets very lively in the evening. Several boats turn into clubs with loud commercial music for the joy of the international tourists, who live Budapest mostly by night.
And finally, Elisabeth (Princess Sissi) bridge. Sissi was Empress of Austria and wife of Emperor Franz Joseph I. History flows with the Danube under the bridges of Budapest.