The Kupa or Kolpa river, a right tributary of the Sava, forms a natural border between north-west Croatia and southeast Slovenia. It is 297 kilometres long, with its border part having a length of 118 km and the rest located in Croatia.
Download Download See moreWikipedia https://en.wikipedia.org/wiki/Kupa
Official Website https://www.belakrajina.si/sl/bela-krajina/kolpa/
Address 8332, Slovenia
Coordinates 45°35'4.498" N 15°17'54.916" E