Khao Kho National Park covers an area of forest Amphoe Lom Kao, Amphoe Lom Sak, Amphoe Mueang Petchabun, and Amphoe Khao Kho and with an area of 304,521 hectares. The forest, which will declare to be Khao Kho National Park, used to be Namtok Than Thip Forest Park. It has high bio-diversity, species and wildlife, beautiful natural tourism places such as the waterfall, caves, isles, islet, cliffs, scenery view point and historical fighting monument encountered between the government and the communist terrorists, which had taken along time before tranquilized. At present has a memorial construction for the heroes who passed away in that war, especially the village’s name, the bridge’s name used first name and last name of the heroes. The beautiful palace made for His majesty the King and Her majesty the Queen in the occasion were be in residence at Khao Kho, Phetchabun.