The ancient Drepanon in the shape of a sickle extends towards the sea, the main source of life for the fishing activity and for the tourist-commercial port (once a source of richness with the coral fishing). Passing through the historic centre, one can read the signs of the various cultural stratifications, from the oldest quarter, Casalicchio, to the Jewish quarter of Giudecca, to the medieval ruins of the Castello di Terra – Land Castle, to the Castello di Mare – Castle of the sea, or of the Colombaia. In the main street, palazzo Senatorio, and palazzo Riccio di San Gioacchino are splendid. The Church of Purgatory which holds the Misteri (twenty sculptural groups depicting the Passion of Christ), and Church of the Collegio are interesting. Not far away from the historic centre is the Sanctuary of the Annunziata and the Pepoli Museum, which holds precious jewels of art. South of the city, the Salt Pans are a unique environmental site from where the Salt Road itinerary begins.