Sustainable Products, Projects and Green Design Issa grotto hill house Single family holiday house by Proarh Davor Matekovic The traditional, rural, hand made topography of the stone-wall (need for horizontal surfaces for cultivation ) is a context that encompasses the aesthetics of the building from its bare function and microlocation. With a concise approach to construction and function of the building in an area with no infrastructure /no water, electricity / it comes to the stripping of the primary needs of the living spaces, use of natural resources and limited means, which in turn create an unobtrusive aesthetic.