Chiang Rai is the northernmost province of Thailand with the border to Myanmar at Mae Sai District where people often talk about visiting the Mae Sai Thai - Burmese Market to shop for products from China and Russia while in fact Chiang Rai has a lot more (and a lot better) to offer.
Chiang Rai province nowadays is agriculture oriented and is renowned for its remarkable blend of scenic mountain and rivers: Doi Tung housing The Royal Villa of the late Princess Mother, Doi Tung Botanical Garden, Doi Mae Salong and its tea plantation, The River Kok and its boat trip as well as elephant trekking, the Golden Triangle where Mekong River separates Myanmar, Laos and Thailand.