Doi Chang is a mountainous region famous for its coffee production, and the area was once home to the cultivation and trade of opium, but thanks to a royal project initiated by King Rama IX to improve people's livelihood and reduce the illegal cultivation of drugs in the region, hill tribe farmers were encouraged to grow winter plants instead of Opium, and Arabica coffee plants were one of the winter crops that were provided for this project. Today, Doi Chang coffee is one of the most famous coffee types in the world and the best in Thailand. When you climb to the top of the mountain, you will be able to see the coffee plantations and discover the stages of cultivation and processing, and of course, taste and buy the coffee, You can also meet the hill tribes that live there.