 Peaks within Taman Negara, Mount Benom, and peaks along the Titiwangsa Range, with different endemic species in each of these montane regions are located in Pahang.The large forest blocks of the west and northeast support nationally important populations of big mammals and other fauna, and act as a unit with Taman Negara.Pahang River is the longest river in the Peninsula, and from its headwaters to the estuary it includes virtually all of the natural river types.