Päijänne is the second-largest lake in Finland, covering an area of approximately 1,100 square kilometers. It is located in the southern part of the country and is known for its clear waters and beautiful scenery. The lake is a popular destination for outdoor activities such as fishing, boating, and hiking along its shores. The Päijänne National Park surrounds parts of the lake, offering protected natural areas for wildlife and visitors. The lake is also significant for its role in providing drinking water to the city of Helsinki and other nearby communities. Its unique ecosystem supports various species of fish and birds.