Trincomalee is a port city on Sri Lanka's northeast coast, home to one of the finest natural deep-water harbours in the world and some of the island's most beautiful and least-visited beaches. Nilaveli and Uppuveli beaches offer powder-white sand and clear water ideal for snorkelling and diving, with Pigeon Island Marine National Park just offshore protecting vibrant coral reefs and blacktip reef sharks. The hilltop Koneswaram Kovil Hindu temple dramatically positioned on a cliff above the bay is one of Sri Lanka's most sacred sites.