Thailand

Mountain areas and plains between the northern mountains The topography of this area is characterized by mountains, valleys and land valleys, between the steep slopes of the northwest and then gradually descending to the low plains. In the southeast and central regions and then gradually rise again in the eastern and eastern regions North of Nan province is the Luang Prabang mountain range. These high areas are the source of many rivers and streams. That flows into the Mekong River in the north