Be sure to bring your camera to capture the flowing waters of Tad Sae Waterfalls. If it's raging, you may be able to feel the mist on your face.
To explore this cascade of water, you'll need to find your way to Luang Prabang. You'll find lots of other interesting attractions in the area, such as Elephant Village, Wat Pa Phon Phao, and Wat Wisunarat.