down the mekong river not too far from the khonephapeng waterfall. there is a rare freshwater species called the irrawaddy dolphins (or pah kha in lao language).the irrawaddy dolphins are a major attraction for tourists.as they are only found in this part of asia. before there were around a thousand of them,but ad tourism industry was not promoted in thispart of laos theirrawaddy dolphins did not expose to people from other places.