The Oder River is a major river in Central Europe, flowing through countries like Poland and Germany. It stretches approximately 854 kilometers (531 miles) and serves as a natural border between these two nations for part of its course. The river is an important waterway for trade and transportation, connecting various cities and regions. The Oder River originates in the Sudetes mountains in the Czech Republic and eventually empties into the Baltic Sea. It features several tributaries, including the Neisse and Warta rivers, and is known for its diverse ecosystems, supporting various wildlife and plant species along its banks.