Site of this project is located on a hill and the purpose is to design a private pool for client. Building orientation is conformed to the field. Soft lines are used to design main walls of the pool in order to keep conformity with mountainous field as project location. Regarding the use of structure as a pool, building’s crust is inspired by layers and graded pattern of whale’s abdomen which is a symbol of sea and water. Then a green roof was designed on the upper crust of the volume in order to reach more conformity with the field. Also staircase structure of the building makes it possible for users to walk on the main space.