text: * Passau, Germany, sometimes called the  (City of Three Rivers), is the site of a triple confluence, described thus in a guidebook: "from the north the little Ilz sluices brackish water down from the peat-rich Bavarian Forest, meeting the cloudy brown of the Danube as it flows from the west and the pale snow-melt jade of the Inn from the south [i.e., the Alps] to create a murky tricolour."
  * The Thaya flows into the Morava in a rural location near Hohenau an der March in Austria, forming the tripoint of Austria, Czechia, and Slovakia.
  * The Morava flows into the Danube at Devín, on the border between Slovakia and Austria.
  * The Sava flows into the Danube at Belgrade, the capital of Serbia.
  * In karst topography, which arises in soluble rock, rivers sometimes flow underground and form subterranean confluences, as at Planina Cave in Slovenia, where the Pivka and Rak merge to form the Unica.