This park features a spectacular limestone karst landscape with an underground river. With 8.2-kilometer probably the longest navigable underground river in the world.
Puerto-Princesa Subterranean River National Park is a UNESCO World Heritage Site since 1999.
The stamp on the right is to honor the Higantes Festival held in Angono on 22nd and 23rd of every November. Main feature of this festival are the parades of towering giants made of paper-mache, some as tall as fifteen feet. These giants are locally known as higantes.