You can follow to local guide on the high or low path from Ban Faen village, but both one-day treks lead to Nam Kat Waterfall buried in old-growth jungle in the limestone outcrops east of Oudomxay Town. Massive boulders surround Nam Kat’s 20 metre cascade, and create a series of smaller cataracts. The easier 13km path follows the stream, along which you can see a large variety of colourful small fish. The rough 13,5 km route, with a 500 metre ascent over Phou Pha Daeng Mountain, presents far-reaching views before descending to the falls and a dip in its pool. Back in Ban Faen, shop for quality bamboo handicraft.