Linked from
The 8 pages that link to Oder, each with the reason it gives.
PomeraniaRelated: The Oder became a major boundary between German and Polish parts of Pomerania.
SzczecinNarrower topic: The Oder carries Szczecin’s principal waterway toward the Baltic coast.
WrocławNarrower topic: The river shaped Wrocław’s islands, bridges, trade, and flood risks.
Lubusz VoivodeshipRelated: The river marks much of the voivodeship’s western boundary.
Bydgoszcz CanalRelated: The canal's western connection ultimately reaches the Oder system.