Poland is home to many rivers, including the Oder, SAN, Notec, Vistula, Nysa, Pega, Narew, and Warta. The Oder is a major river in Central Europe that forms part of the border between Germany and Poland. The SAN is a river in southeastern Poland that flows into the Vistula River. The Notec is a tributary of the Warta River in western Poland. The Vistula is the longest river in Poland and is the country's most important waterway. The Nysa is a river in southwestern Poland that flows into the Oder. The Pega is a tributary of the Vistula River in central Poland. The Narew is a river in northeastern Poland that flows into the Vistula. The Warta is a river in western Poland that flows into the Oder.