“Were it not for shadows, there would be no beauty.”   Jun'ichirō Tanizaki    Salone quarry (in Italian “Latomie di Salone”) is a part of ancient Roman quarries, which today are located between the industrial area Tiburtina and the A24 and A90 (GRA) motorways.   Despite being in a state of complete abandonment, its 10 m altitude has marked the boundary between industry and quarry natural area.   It is necessary to develop a project design to enhance the morphology of the quarries, considering the historical and natural aspects of this complex system.    An excavated room, like the many cavities in Salone, has got a single side from which light can come. The shadow has an aesthetic value (as also written by J.Tanizaki): a lot of nineteenth-century artists came to these areas to experience their art.  Darkness is also a condition that can bring the blind and the sighted to the same sensory level; indeed, those who do not see can benefit from having a better understanding of this circumstance.    This assumption is the key of the“Dialogue in the Dark” exposition: in the absence of light, visitors, accompanied by blind guides, must rely exclusively on touch, hearing, smell and taste. It is not a simulation of blindness.    Project intervention are selective and they do not have to alter the natural character of the area.   The whole system of excavated rooms must be a starting point for the routes inside and outside of the tuff quarry.  The building-ground relationship can offer many variants, taking into account zenith lighting.