Mountains take up part of northern Thailand and extend along the country's western border to the Malay Peninsula. Inthanon Mountain, Thailand's highest peak, is in this region. The mountain rises 8,514 feet (2,595 meters) above sea level. Forests of evergreen trees and some broadleaf trees, such as teak, cover most of the region. The mountains are broken by rivers running south.
The Khorat Plateau, also known as Isan, lies in northeastern Thailand and makes up about one-third of the country's land area. Mountains separate the plateau from central Thailand to the west and Cambodia to the south.
The Central Plain extends from the foothills of the north to the Gulf of Thailand.This is where most of the farmers raise there rice because the soil is so fertile. Thailand's main river, the Chao Phraya , runs through the region and provides irrigation and transportation.