Deep blue water, dry grasslands with grazing yaks, and a snowy mountain range as a backdrop: the lake Nam Tso is exactly what you imagine Tibet to be. And who of you has ever swum in a lake at an altitude of over 4700 m?
On the way we pass a group of pilgrims in the middle of nowhere who throw themselves flat on the ground after every (!) step! They obviously have a long way to go before reaching Lhasa.