At Km 14.5 on Rte 11 to Attapeu you'll see a turn-off on the left to Tat Faek, a 5m high waterfall with two pools in which you can swim. Swimmers should use the one above the falls, as a diabolical-sounding puffer fish known as the pa pao is believed to lurk in the pool below. Locals report with a sort of gleeful dread how the evil pa pao can home in on and sink its razor-sharp teeth into the human penis with uncanny precision. Admittedly, the women are more gleeful about this than the men. The falls are 2.4km from the Rte 11 turnoff. The pools fill up with locals on weekends and holidays.
