Brown Lake is a natural lake located on North Stradbroke Island in Queensland, Australia. It is known for its unique brown color, which comes from the tannins released by the surrounding paperbark trees. The lake is a popular spot for swimming, picnicking, and enjoying the serene environment. The area around Brown Lake is rich in biodiversity, making it a great place for nature lovers. Visitors can explore the nearby walking trails and observe various wildlife species. The lake is also significant to the local Quandamooka people, who have cultural ties to the land and water.