is perfect for those who find regular rock climbing or repelling to be a bit mundane. Throw in the force of a waterfall, and now you're talking adventure. Many hotels and travel guides have programs that allow you to abseil, or repel, down Thailand's beautiful and powerful waterfalls. You'll feel your heart in your chest as you lean over the edge of a 35-foot waterfall and the ground slowly slips beneath your feet. Find out more about waterfall abseiling at Doi Inthanon in Chiang Mai.