Rivers nearly always add a great element to your photo, especially when shooting long time exposures in the evening or during the day with a ND filter, which can be used to reduce the amount of light coming through your lens.
Great combinations to rivers are for example skylines or mountains, which get reflected by the water.
photo by Manuel Becker
photo by Dirk Wiemer
photo by fototante.de
photo by Manuel Becker
photo by fototante.de
photo by Emanuel Pereira
photo by Paulo Azevedo
photo by Manuel Becker
photo by the-phlogdotcom
photo by Manuel Becker
photo by Manuel Becker
photo by Selman Dogan