The Old Tung Chung Pier at the mouth of the Pearl River is located on the largest island in what city?
Lantau Island Lantau Island (also Lantao Island; ) is the largest island in Hong Kong, located at the mouth of the Pearl River. Administratively, most of Lantau Island is part of the Islands District of Hong Kong. A small northeastern portion of the island is located in the Tsuen Wan District.