The Narew ([ˈnarɛf]; Belarusian: Нараў, romanized: Naraŭ; Lithuanian: Narevas or Naruva; Sudovian: Naura; Old German: Nare; Ukrainian: Нарва, romanized: Narva) is a 499-kilometre (310 mi) river primarily in north-eastern Poland, which is also a tributary of the river Vistula. The Narew is one of Europe's few braided rivers, the term relating to the twisted channels resembling braided hair. Around 57 kilometres (35 mi) of the river flows through western Belarus.