Puerto Princesa is a boring, unappealing, chaotic city with some good restaurants, a few live-music clubs and a nice walkside on the Baywalk. It's nothing special but along the seaside there are some small food stalls, some shop sellers, lot of teenagers and families enjoying one of the few relaxing areas of PP.
I and my friend visited the famous underground river with its emerald green waters, its majestic wierd stalactites and stalagmites shaped in different ways (Holy Family, Jesus Christ face, corn-cob) and its unique microfauna living inside one of the few floating caves in the world. It was a nice experience the friendly tour guide seemed to repeat a "lesson" learned with the huge amount of touristis crowding this place but for sure it's a kind of exaggeration saying that this site belongs to the new list of the most beautiful places in the world. In Italy we have too many caves (Frasassi, Postumia)that are not less spectacular.
After a long and tiring trip we arrived to the famous El Nido, a tiny, crowded, now touristic village who was born as a fishing village and as a place for "harvesting"the sparrow nests (El Nido means The Chest in spanish). This strange and dangerous activity is quite famous alla around asia: some brave locals use long and tall bamboo ladders to grasps these chests made by regurgitating sparrow saliva, and this very expensive saliva is considered a very good and natural medicin for many diseases other than a skin tonic.
However the last 10-15 years this place underwent the assault of mass tourism thanks to the amazing beaches, the pristine waters and it's natural and unique bays. North Europeans, Australians, Americans and, during Easter time, Pilipinos throng this places and as a result everything costs between 30 and 50% more than in the other regions of The Philippines (except Boracay).
Excursions, especially A and C, takes you with about 20 US dollars to marvellous islands, amazing coral reefs, incredibles hidden coves, stunning small churches and super snorkeling spots.
Once in your life you have to come here but a second time, in my opinion, unless you rent or owns a sailboat that will allow you explore many other spots, I will not return and prefer explore one of the many other natural jewells of this country.