Phu Langka National Park covers the area of approximately 31,250 Rai in Pai Loam Sub-district, Ban Phaeng District of Nakhon Phanom Province, and Seka District of Nong Khai Province. The area includes layers of three mountains overlapping each other, interspersed with small mountain ranges spreading along Mekong River. There generally are lush forests such as dry evergreen forest, mixed deciduous forest and dry dipterocarp forest which are habitats of abundant wildlife and watershed for many streams. Best season to visit are from May to October when numbers of wild flowers and orchids bloom on top of Phu Langka Mountain. Interesting sights inside the national park include;