This is already my 3rd time visiting the Underground River in Puerto Princesa, Palawan. The first one was when it was not yet internationally famous, in the early 90s when even man-made wooden paths are not yet in place. The 2nd time was in 2013, when my friend and I decided to see it again as an alternate to a foiled group tour to El Nido. That time it was already voted as one of the 7 Wonders of Nature, and schedules within a day are already filled-up about 3 months earlier. It is now well organized that boats and trips per boat are already stablished to successfully put the desired carrying capacity within the day. Moreover, tourist shops and restaurants already mushroomed at the jump off point of the boats in Sabang pier (photo below).
This is the shore where the boats from Sabang first anchor, and the passengers will get off the boat, walk a few meters to the Underground River entrance, where another small paddle boat takes them inside the cave for the underground river cruise.
This water in front of the cave entrance is brackish because the seawater comes in at high tide. It also drains freshwater from the limestone mountain ranges above it.
That structure above center is a big developing structure, i am not sure if it can be considered a stalactite. I also don't have any idea how many million years before it lengthens and reach the water below. At the lowest right hand corner you can see dark spots. those are bats that live in the cave. There is one area there very full of bats, but we didn't go there for we might be full of droppings.
I am inviting everyone to go and get the experience, it really is amazing and very interesting. I am comparing in my mind the differences of an undeveloped natural site and a developed one. This one is still undeveloped because no man-made structures are put in there. It is only the system that they improved, and that is the best way to do in natural wonders like this.