What are the hills of Brazil?

The Serra do Mar (Portuguese pronunciation: [ˈseʁɐ du ˈmaʁ], Sea Range), also known as Serra Costeira (Coastal Range), is a long, rugged mountain range that runs parallel to the Atlantic Ocean along the coast of southeastern Brazil. It is part of the larger Brazilian Highlands system and is the most prominent landmark of the coastal region. The range forms the eastern escarpment of the Serra Geral Mountains, which runs north to south through most of eastern Brazil. The Serra do Mar is characterized by jagged peaks, deep valleys, and lush vegetation, and forms a dramatic backdrop to many of Brazil's most famous beaches.

The Serra do Mar begins in the state of Rio de Janeiro, where it is known as the Serra dos Órgãos (Organ Mountains). The range continues north through the states of São Paulo and Espírito Santo, where it reaches its highest point, the Pico da Bandeira, at 2,892 m (9,488 feet). The Serra do Mar then continues into the state of Bahia, where it is known as the Serra do Mar de Dentro (Inner Sea Range). The range ends in the state of Sergipe, where it meets the Atlantic Ocean.

The Serra do Mar is a major water divide, with rivers on the eastern side flowing directly into the Atlantic Ocean, while rivers on the western side flow into the Paraná River Basin. The range also forms a barrier between the densely populated coastal regions and the less-developed interior of Brazil.

The Serra do Mar is home to a wide variety of plant and animal life, including many endangered species. The range is protected by several national parks and nature reserves, including the Serra dos Órgãos National Park, the Serra da Bocaína National Park, and the Intervales State Park.