We woke up early on our second day in Puerto Princesa. Our lack of sleep did not douse our spirits. After all, we were off to see one of the most iconic landmarks of Palawan; the Puerto Princesa Subterranean River. Commonly known as the Puerto Princesa Underground river, this UNESCO World Heritage Site attracts hundreds of tourists all-year round. In 2012, it was included in the New Seven Wonders of Nature.