Loei is one of the most sparsely populated provinces of Thailand, located in the North-East of Thailand. Neighboring provinces are (from east clockwise) Nong Khai, Udon Thani, Nongbua Lamphu, Khon Kaen, Phetchabun, Phitsanulok. In the north it borders Xaignabouli and Vientiane Province of Laos. Loei is a city surrounded by undulating mountain ranges whose summits are covered by foggy lines, abundant with various kinds of flora. The well-known ones are Phu Kradueng, Phu Luang and Phu Ruea.