Puerto Princesa Underground river tour shore excursion UNESCO

Underground river is a World Heritage Site inscribed by UNESCO on December 4, 1999. The Worlds Longest Navigable Underground River and Now One of the 7 Wonders of Nature. The primary tour destination PPUR has the worlds navigable Underground River with its spectacular rock stalactites and stalagmites formation that made it to be among the UNESCO WORLD HERITAGE SITE and awarded as RAMSAR site. Tour inside the cave would cover the first kilometer of this 8.2 km Underground River known to be the longest navigable in the world .