Which rivers flow through the plains near Zagreb?

The Sava and Drava rivers are the primary waterways coursing through the Pannonian and para-Pannonian plains of Croatia.1

Specifically, the Sava River flows through the capital city of Zagreb as it moves through the region. While the Sava and Drava valleys are separated by the Zagorje Hills to the north of the city, both rivers are central to the drainage of these northern plains. Additionally, the Kupa River is noted for its importance in the region and its role as a tributary that flows into the Sava.123