The Puerto Princesa Subterranean River National Park or popularly known as the Underground River is the the world's longest navigable underground river and one of the New Seven Wonders of Nature. Guests will enjoy seeing various limestone formations which were formed thousands or even millions of years ago. Truly, this makes Underground River the number 1 tourist attraction in the city. Important Note: Underground River tour permits are limited to a maximum of 1000 slots per day and should be booked ahead of time. Ideally a month before arrival. Minimum time for me to process the permits is atleast 5days before arrival. Your tour permit will only be processed or secured upon booking confirmation from Tripadvisor Experience. This tour is subject to weather conditions.
• 8 hours