Start with the stone itself. The cliffs of the Scala dei Turchi are white marl, a soft, chalky rock. Waves and wind have worked on it for millions of years and shaped it into the broad, rounded steps that give the place its name. Because marl is soft, the cliff is never finished. The sea and the wind keep reshaping it. That makes it beautiful, and it also makes it vulnerable, which is why protecting it has become such a serious matter. The coast here has a hot-summer Mediterranean climate, with mild, wet winters and hot, dry summers. The average annual temperature is 17.1 degrees Celsius. Spring and autumn are the comfortable in-between seasons. In full summer the white rock throws back the glare, so the contrast with the blue water is at its sharpest. Look for the white shelves, the smooth, sloping surfaces, and the line where stone meets sea. Each one is a snapshot of erosion happening slowly, in real time.