In 2007, my Granddad visited China. On the roof of the world, as a matter of fact. The Himalaya and Tibet's holy sites.
One of his most exhausting trips since the air was very thin and not just proverbially.
However, He was able to take unique impressions along that will accompany him the rest of his life.
But see for yourself:
The colorful flags, you're seeing here, are Tibetan prayer flags on top of the mountains of the Himalaya. The locals put their blessings on those flags, hoping that they will come true.