An overturned arch placed on the margin of a flat hillock, a short distance from the precipice that marks its end, underlines (not just ideally) the landscape around Volterra, with its gentleness, but also its harshness, resulting from its geological structure. With a gently arched sign ending in sharp, rigid extremities, Staccioli encourages us to contemplate the natural scenery and the lines modeled by the erosion of the clayey soil, with its ravines and constantly changing colors.