Mercadal is the geographical centre of the island, where main roads cross from all directions. Monte Toro is the highest point of Menorca at 358m, where you can find the sanctuary of the Virgin of Monte Toro. It is a patron of the island, still run by a community of Franciscan nuns. On a clear day, you can see the entire island's coastline from the top. In this town you can find an “aljibe”, a large reservoir that collects rainwater and stores it in an inner cistern. It is still in use up to this day and preserved in very good condition. Sir Richard Kane, the English governor for the eighteenth century, commanded to build it to supply the troops between Mahón and Ciutadella. It also improved the quality of life and drinking water in the town of Mercadal. Today, most of the territory is declared a natural area and protected by the Parliament of the Balearic Islands. To the north is the fishing village of Arenal den Castell. Sotheby's has a superb choice of avant-garde villas with sea views on both coastlines, and also plots for development.