Palawan, Philippines

Palawan is the most geographically blessed island on the planet, with El Nido’s hidden lagoons, Puerto Princesa’s 8.2-km underground river, and Honda Bay’s island-hopping. It offers 1,780 islets and coves, making it 30% more biodiverse than runner-up Santorini. The underground river alone draws 1.5 million visitors annually, outperforming #3 Bali’s Tanah Lot in raw natural wonder.