The Havel River is a significant waterway in northeastern Germany, flowing through the state of Brandenburg. It stretches approximately 325 kilometers and is a tributary of the Elbe River. The river is known for its scenic beauty, with numerous lakes and forests along its banks, making it a popular destination for outdoor activities like boating and fishing. The Havel River passes through several towns, including Potsdam and Berlin, where it plays a vital role in the local ecosystem and economy. It is also part of the Havel Canal system, which connects various waterways, facilitating navigation and transportation in the region.