in addition to the beaches in the zona sul(south zone) of rio, many other beaches face guanabara bay - many are located on ilha do governador, ilha de paquetá, and niterói.
traversed by the landmark rio - niteróibridge, guanabara bay is of particular importance, as several urban centers are located along its shores, including niterói, săo gonçalo, and duque de caxias.
there are over 10,000 industries in the drainage basin, in addition to two oil refineries along the shore of the bay that are responsible for the processing of nearly 20% of the national oil.
