Trincomalee has one of the largest natural harbors in the world. Because of this several European nations fought over Trincomalee, which was already one of the most visited places of Hindu worship. Close to Trincomalee are two UNESCO World Heritage Sites. One is the ancient city of Polonnaruwa, the former capital of the Kingdom of Polonnaruwa dating back to the 12th century with its impressive ruins and statues. The second site is Sirigiya; the city of the Rock Fortress. Sirigiya is Asia’s best-preserved city center dating back to the first millennium. A massive wall defends part of the lower city and various features have been overgrown by the forest or await excavation. At the site’s summit is the fortified palace with its ruined buildings, cisterns and rock sculptures.