Phu Quoc is Vietnam's largest island, located in the Gulf of Thailand off the coast of Cambodia, and has developed rapidly into a major beach resort destination. Long Beach (Bai Truong) and the north's Ong Lang Beach offer palm-fringed coastline with clear water, while the southern archipelago of An Thoi is excellent for snorkelling and diving. The island is also famous for producing Vietnam's finest fish sauce and for its pepper plantations.