The Natural and Culturo-Historical Region of Kotor is a UNESCO World Heritage site, comprising the territory between Orjen and Lovćen, including all the small towns in the bays of Risan and Kotor with their natural setting. With this privileged natural harbour the Bay of Kotor has been settled for millennia. Illyrians and Greeks colonised the coast from 400 BC and established today's ports Risan (Rhizon) and Kotor (Cattaro). Due to lack of potable water, the high mountain was never densely populated. Snow patches collected from deep pit holes were used even late in the 20th century to provide the few hamlets with water. Today, wells are used instead.