The Puerto Princesa Subterranean River National Park, commonly known as the Underground River, is one of Palawan's most famous attractions and a UNESCO World Heritage Site. Located about 80 kilometers north of Puerto Princesa City, it features an 8.2-kilometer-long underground river that flows directly into the sea. This natural wonder is nestled within a protected area of lush forests and limestone karsts, showcasing breathtaking stalactites, stalagmites, and large cave chambers.
The river is accessible by guided paddle boats, offering visitors a chance to explore its unique ecosystem, which includes bats, swiftlets, and other wildlife. It is also recognized as one of the New 7 Wonders of Nature, highlighting its global significance and appeal.