If you stay in Chiang Mai and can’t decide for which day trip you should go for, then it’s definitly the one going to Doi Inthanon National Park, which is a two hours car drive away from Chiang Mai. You could potentialy rent a car or motorbike and go there on your own but I opted in for an organized day trip. It’s well worth to check several travel agencies as some give a little discount. I booked with http://www.wintravel.co.th as they offered the best price. Tip: ask for Halal food, usually you will get the better meal for the same price 😉 and please don’t forget your sweater or jacket as it can get pretty cold up there.