Northeast or Isan (from Pali Isan, Sanskrit ईशान्य īśānya Isaan means "Northeast") [2] is a region in Thailand located on the Korat basin and the Sakon Nakhon basin with the Mekong River barrier. Laos, to the north and east of the south, there is the Phanom Dong Rak mountain range , Cambodia and eastern Thailand, and the Phetchabun mountain range and the Dong Phaya Yen mountain range. Is a barrier in the west separating from the central region