 The main waterway is the river that marks the border Petrace north-east of the township, the resort "Pontevecchio" to its mouth on the Tyrrhenian Sea.The most westerly tip is called "Cape Barbi", and from this promontory starts the Violet Coast.The name comes from the fact that the sea, a short distance from the coast, reaches great depths by placing the water a deep blue color that the sun, at sunset (between May and September), color with violet reflections.