Одра is a river in Central Europe, primarily flowing through Poland and Czech Republic. It is approximately 854 kilometers long and is one of the major rivers in the region. The river originates in the Sudetes mountains and eventually flows into the Oder Estuary in the Baltic Sea. The Odra River serves as an important waterway for transportation and trade. It also supports various ecosystems along its banks, providing habitats for numerous species of plants and animals. The river is a popular destination for recreational activities such as fishing, boating, and hiking in the surrounding areas.