Serra da Cantareira is a mountain range located in the state of São Paulo, Brazil. It is part of the Atlantic Forest biome and is known for its rich biodiversity, including various species of flora and fauna. The range is a popular destination for outdoor activities such as hiking, birdwatching, and nature photography. The area is also home to several parks, including Parque Estadual da Cantareira, which offers trails and scenic viewpoints. The mountains play a crucial role in the region's climate and water supply, serving as a natural barrier that helps maintain the ecological balance in the surrounding urban areas.