The northeast of Thailand, or Isan (pronounced ee-săhn) as it’s usually known, stretches from the wild Mekong River (Mae Nam Khong in Thai) down to the edges of the Khorat Plateau, and is home to Thailand's best national parks and most ancient temple ruins. Rich in religious significance and influenced by nearby Cambodia and Laos, it has a culture and food all its own.
As the country’s most populous region and second-largest in terms of area, this relatively dry expanse is known more for its farming, culture and hard-working people than its tourist sights. But dispel those stereotypes from your mind – while it doesn't have the beaches or wild parties, it is rich in natural attractions, historic sites and unique cultural activities. The traditional music reflects the pulse of the agrarian culture, and the people are down to earth and friendly. The place moves to its own rhythm. If you relax into it and go with the flow, you'll find a warm welcome.
Read more: http://www.lonelyplanet.com/thailand/northeastern-thailand/introduction#ixzz4AaX89hgr