The Serra do Mar is a mountain range located along the southeastern coast of Brazil. It stretches approximately 1,500 kilometers from the state of Rio de Janeiro to Santa Catarina. This range is known for its lush Atlantic Forest, which is home to diverse flora and fauna, making it a vital ecological area. The Serra do Mar is also significant for its role in Brazilian history and culture. It has influenced the development of cities like São Paulo and Rio de Janeiro, providing natural resources and serving as a barrier to urban expansion. The region is popular for outdoor activities, including hiking and birdwatching.