Creating conditions of comfort to overcome the difficulties of the closed, noisy and completely buried working environment, constituted for architects, the biggest problem in the design of underground plants. Miranda's, in a cave, 80m long, 19.6m wide and 42.7m high, is particularly interesting due to the treatment of the ceiling, walls and the way the pillars articulate in their supporting function of the crane . The Comando building, of Discharge and Parque de Linhas, are located on the right bank, on an artificial platform, crowning a spur of rock that gives the tight curved shape of the river. Designed according to a volumetric scheme articulated in two bodies of controlled geometry, they are interconnected through a set of transparencies that allows the immediate location of the accesses and the visual projection to the exterior of the building. Access to the underground power station is through a 9m diameter and 63m deep well. It has been in operation since 1960. Its architecture is of high quality, everything was designed, including furniture, by the team of architect João Archer in 1959
