Comprising portions of Rio de Janeiro State and Minas Gerais State, just as three Municipalities, Resende, Itatiaia and Bocaina de Minas, the region includes Pedra Selada (visible from Dutra) and Pico das Agulhas Negras (being part of Parque Nacional do Itatiaia). For location purposes, the region was divided in three Vilas (towns): Vila de Visconde de Mauá, Vila de Maringá and Vila de Maromba.
