Cantareira State Park is a large protected area located in the state of São Paulo, Brazil. Established in 1962, it covers approximately 7,900 hectares and is part of the Atlantic Forest biome. The park is known for its rich biodiversity, including various species of flora and fauna, some of which are endangered. The park offers numerous trails for hiking and opportunities for birdwatching, making it a popular destination for nature lovers. It also plays a crucial role in water conservation, as it helps to protect the watersheds that supply drinking water to millions of people in the surrounding urban areas.