‘Light Walls’ is a photography serie by spanish artist Aitor Ortiz. This series was photographed at the black marble quarry in the Biscayan town of Markina in 2004. The project addresses the problem of the wall and its visual instability, its fluctuating position between forward and reverse. A tilting whose origin is only formal, but that has to do with our most intimate experience of space. A huge mass of rock is drilled to deny its impenetrability and to build a bright living space.