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The islands of Palawan stretch between Mindoro in the northeast and Borneo in the southwest. It lies between the South China Sea and the Sulu Sea. The province is named after its largest island, Palawan Island (09Â°30â²N 118Â°30â²E / 9.500Â°N 118.500Â°E / 9.500; 118.500), measuring 450 kilometres (280 mi) long, and 50 kilometres (31 mi) wide.
And itâs largely thanks to its latest claim to fame: Puerto Princesa Subterranean River, a Unesco World Heritage Site, has been named one of the worldâs best natural wonders. 1  Stunning: Palawan Island in the Philippines has been named the top island in Conde Nast Travelerâs Readersâ Choice Awards. Puerto Princesa Subterranean River, a Unesco World Heritage Site, has been named one of the worldâs best natural wonders. Best in the world: The idyllic island of Palawan claimed top spot based on over 76,000 votes. Undersea adventures: Palawan is home to some of the best locations for snorkelling and diving.