In many religions of the world, collective prayers are often lifted in an audible form, but there is often a visual form as well. Candles are lit, altars are raised, monuments built. There’s something about seeing a physical representation of a person’s prayer that I find awe-inspiring. Tibetan Buddhists are no exception. They raise prayer flags in high spaces, streaming them across the mountainside, lifting prayers for others: for peace, for protection, for happiness. Seeing what must be hundreds of thousands of flags fluttering in the wind, knowing the many people they represent, is one of the most spectacular sites I have ever seen.
In the evening or early morning, the flags are just as beautiful and serene. 
I like the idea of the flags being a visual representation of prayers. I am sure to see all of them blowing in the wind is quite awe inspiring.
I love the way you focused on perhaps 10-15 prayer flags in the first shot. That’s like one person’s prayers for the day, right? Then in the next photo, there are hundreds. The thought of all of those prayers is absolutely breathtaking.
Great shots! I’m even more jealous of your trip now!