Haft Berke or Seven Lake (in English) is located in Garsh Township in Fars province. These seven water reservoirs are made in different sizes and different times; they are in a short distances from each other and they are located in a path to seasonal river called Bezerd in Nasag.
From these seven reservoirs, five of them have domed roof and two of them have no roof; the biggest and the most famous one is known as Haj Abolhasan's pool.
According to an inscription installed at the northeast entrance, this reservoir is made by Haj Abolhasan's effort the son of Haj Hasan. Its unique feature is to be continued from the wall of reservoir to the bottom of it and in other entrances is continued to four rows. Its water tank is circular besides its arches and its inlet and outlet ducts are crescent.
The portals, arches and entrances are made in Tizedar Shape and some of the arches have stalactite ornament.