Tat Soung is a 50m drop over the edge of the Bolaven Plateau, and though the dam has affected these falls more than the others – slowing them to a trickle for most of the year – you can walk around the rocky top of the falls from where the views are fantastic. During heavy rains from August to October, when they reach their full width, the falls themselves are quite spectacular too.
Tat Soung is 8km south of Tat Lo town, uphill almost the entire way. Along the way, 3.5km out of Tat Lo, you'll pass a sign for the bottom of the falls at Ban Kiang Tat Soung (Kiang Tat Soung Village). (Note that the sign inside the village saying 'top' is a mistake.) It's a fun walk and a beautiful destination, and young guides will offer to walk you there for a small tip. It's a round trip of about 1.5km. Definitely don't leave anything in your motorcycle basket; chances are it won't be there when you get back.