This is the tube house designed by Charles Correa and located in Ahmedabad, Gujarat India and made in 1961-1962. Even thought the Gujarat Housing Board specified walk-up apartments Charles designed a low cost house that provided the same density and large living space for families and won first prize. The even though the design of this house is simplistic it has a lot that goes into it having natural ventilation having the hot air rise and exit the house through the roof and still being spacious enough for large families. Even though this house has almost no doors the privacy for this house is created by the different levels.