This mansion is located at the end of the main orbit of the garden and is connected to the southern wall. The Hashti mansion possesses three big rooms and a pool room (made of uncut marble) in the middle. Its structure resembles the structure of other Iranian main rooms. It has a hall and a terrace on its upper floor. In fact, this mansion is considered to be the main building of the garden and is very famous for its notably tall wind tower. This wind tower stands with its 33 meters and 80 centimeters height and is the tallest wind tower in Iran. This wind tower was renovated back in the 70s. The wind tower possesses eight entrance passages for the winds. The cold air of the outside enters through four passages while the hot air of the interiors exits through the other four. This is how a pleasant temperature permeates the room in the summer.