Flight of the Gibbon
Flight of the Gibbon offers a unique experience to tour the 1,500-year-old Thai rainforest from a series of zip-lines, sky bridges and lofty viewing platforms. If you book in advance through your guesthouse or a booking agent they will pick you up for free, but don't expect to enjoy it if you don't have a head for heights.
Learn Thai cookery
There are countless organizations in Chiang Mai offering to teach the basics of Thai cooking. All the ingredients are included in the price of the course and students often have the choice of a few different dishes to cook. You can return home with your new skills and impress your friends at a dinner party, but the best thing about this activity is gobbling down your hard work at the end of the day.
Muay Thai boxing
There is a Muay Thai boxing venue in Chiang Mai which hosts big fights every Thursday night that are often not for the faint-hearted. The ancient martial art is now practiced all over the world, and many international fighters try their luck here against the veteran Thais. There are also several camps in Chiang Mai that offer rigorous training programs for those wishing to take their chances in the ring, but just don't expect too much of an easy ride.
Chiang Mai is one of the best spots in Thailand if you're a keen golfer. As well as several driving ranges, there are in excess of 10 clubs which all offer reasonable rates for a go on their greens. The Gymkhana club is one of the oldest sports venues in Chiang Mai and a great place to play a few rounds. Other clubs include Green Valley, Lanna and Mae Jo.