Rai Land of Mountains A province in the far north of the country. An old city with a long history, from the days of Chiang Meng. Rai founded the city on the river basin area. Rich forests on the mountain complex. As the source and several spectacular waterfalls. The mountains and the water ghost boundaries or borders Myanmar to the north. It is the first point where the river flows through Thailand. A border barrier between Thailand and Laos.