Go white-water rafting on the fast-flowing Mae Taeng River in northern Thailand, passing forested mountains, rice fields and waterfalls during a speedy 2-hour ride downstream. Prepare to get wet in the canyon rapids as you paddle past hill-tribe villages with expert guides leading the way. Your full-day trip includes lunch and a stop at Sai Nam Phung Orchid Farm, with round-trip hotel transport from Chiang Mai.