Located in front of the Cambodia coast, Phu Quoc is the largest island in Vietnam. Phu Quoc is what Phuket would be if it hadn’t been overrun by development. The island features pristine tropical forests, undamaged coral reefs and great beaches. One of its beaches, named Bai Dai (Long Beach), was chosen by the ABC News as one of five beautiful and clean beaches. Phu Quoc is famous for producing the best nuoc mam or fermented fish sauce in the world.