5. The world’s longest underground river system accessible to man in the world is located at the St. Paul National Park in the province of Palawan.
6. The world’s largest pearl was discovered by a Filipino diver in a giant Tridacna (mollusk) under the Palawan Sea in 1934.
Known as the “Pearl of Lao-Tzu”, the gem weighs 14 pounds and measures 9 1/2 inches long and 5 1/2 inches in diameter. As of May 1984, it was valued at US$42 million. It is believed to be 600 years old.
7. Palawan bearcat is neither a bear nor a cat.
Known in Southeast Asia as binturong, the bearcat is a species of its own, with population in the forests of Palawan, Borneo, Burma and Vietnam. It belongs to the family of Viverridae (civets). The Palawan bearcat has a long body and a pointed face leading to the nose. Its head and body measure 61 to 96 centimeters in combined length while its tail is almost as long. It weighs 9 to 14 kilograms and lives up to 20 years.
8. Calamian Islands, north of Palawan province, keep a species of deer that cannot be found elsewhere, the Calamian Deer.
Axis calamianensis by Scott Hanko
Scientists referred to the hog deer in the islands as Calamian deer in order to distinguish them from other hog deer in the world. An ordinary Calamian deer measures 105 to 115 centimeters in length and 60 to 65 centimeters high at the shoulder and weighs about 36 to 50 kilograms. It is said to have longer and darker legs, compared with other hog deer.