Get ready for a day full of natural wonder discovery as you visit the Puerto Princesa Underground River – a UNESCO World Heritage Site. Located underneath St Paul Mountain, it is a passage through glistening formations of limestone rock including a huge cathedral-like cavern. Marvel at the inner recesses filled with stalactites and domes amphitheaters. The river flows beneath a spectacular karst mountain before emptying into the South China Sea. The world longest navigable underground river, just 2-3 hours ride in an air-conditioned van on rugged and winding road while enjoying the scenic beauty of the countryside. Enjoy a 45 minutes tour inside the cave.

Transfer back to the hotel after sightseeing and overnight.