Tegel Lake is a large freshwater lake located in the northern part of Berlin, Germany. It covers an area of approximately 4.5 square kilometers and is part of the Tegel Forest area, making it a popular destination for outdoor activities such as swimming, sailing, and hiking. The lake is known for its clear waters and scenic surroundings. The lake is fed by the Havel River and is connected to other bodies of water in the region. It is also home to various species of fish and birds, contributing to the area's biodiversity. The surrounding parks and paths make it a favored spot for both locals and tourists.