The Po Valley, Po Plain, Plain of the Po, or Padan Plain (Italian: Pianura Padana [pjaˈnuːra paˈdaːna] or Val Padana) is a major geographical feature of Italy. It extends approximately 650 km (400 mi) in an east-west direction, with an area of 46,000 square kilometres (18,000 sq mi) including its Venetic extension not actually related to the Po River basin; it runs from the Western Alps to the Adriatic Sea.