Sibalom Natural Park, one of the last patches of lowland forest on Panay Island and the first protected area in the island, harbors many unique species of plants and animals, some of which are on the brink of extinction. About of forest in Sibalom from Mount Porras extending to Mount Igmatindog, covering Sibalom river and its main tributaries Mao-it river and Tipulu-an river, was declared a natural park on April 23, 2000. Of this forest, are undisturbed by any human activity while about constitutes the 50-year-old reforestation site. One highlight is the Rafflesia speciosa, discovered in Mount Porras and surrounding Barangays in 2002. Dubbed the biggest bloom in the world, its discovery put Sibalom in the map of tourist stopovers in the Philippines. Sibalom also has century-old industries and structures, as well as boulders of gemstones and treacherous mountain trails.