From what I could tell from the various blogs and articles about it, the trip is approximately 2 1\2 hours away from Puerto Princesa city. It really is like a mini Palawan underground river in Sabang. It's in the Tabon Caves complex National Park and apparently you have to take a banca ride to get to either. Head to Quezon National Museum. You have to pay P20.00 to enter the museum, then another P20.00 for the Tabon Caves. It's P 800.00 for the round trip boat ride to the caves cove.
Beautiful mineral formations, though a smaller scale abound. During rainy season, it cannot be reached as the waters are too deep, and running too fast to safely traverse.
The stalactites are within reach, and tourists have done selfies touching them. If they want to make this famous and a livelihood for the locals, someone needs to step in from Tourism to help them with guidelines, and rules for the cave to protect it from human damage, either intentional or unintentional. To preserve this cave and its eco system as it is, please keep your hands off the mineral formations though!
A permit can be purchased and guides hired at in Quezon town at the Quezon National Musem . Here is an extensive travel blog about the other caves in the area as well. http://www.ambot-ah.com/tabon-cave-lipuun-quezon-palawan/
"The artifacts recovered belong to different periods ranging from 50,000 years ago to the 14th century A.D. The most celebrated archaeological find is the Tabon Man, one of the oldest known human skeletal remains in the Philippines dating back to 16,500 years (14,000 B.C.). The oldest human fossil so far recovered from the Tabon Cave, however, is a tibia (bone of the lower leg) that dates back to 47,000 years (45,000 B.C.).'
"There are approximately 215 caves in the reservation, 38 of which have been established to be of archaeological and anthropological significance. To date, only seven caves are accessible and open to the public. Between 1962 and 1966, an archaeological exploration was conducted by a team from the National Museum headed by anthropologist Dr. Robert Fox in the caves of Lipuun Point and its immediate vicinity. It brought to light an astonishing concentration of archaeological cave sites containing substantial cultural materials with an extensive time range unsurpassed in the Philippines, and possibly equaled only in a few sites in Southeast Asia (e.g. Sarawak and southern Thailand)." Excerpt from blog.
Here is another blog abut the Tabon cave complex.
Here is a TV report about the mini caves. It is in Tagalog.
Mini underground river, Quezon, Palawan
|"The picture with the title Mini Underground river, Quezon, Palawan was taken by the photographer Che 22 on 13 April 2012 and published over Panoramio. Mini Underground river, Quezon, Palawan is next to Tabon and is located in Province of Palawan, Mimaropa, Philippines" From this weblink|