What is the cause of the weather phenomenon?

The so-called "sky view" is actually a special erosion landform. It is like a deep well, and people look up from the bottom of the well, just like sitting in the well and looking at the sky; Some are like a slender vertical hole, from which light can only be refracted, which is very dark; Some seem to be cut by a knife, and the gap is very narrow. From bottom to top, there is only one line left in the sky, so it is called "one line of sky".

In fact, it is the erosion of flowing water formed by external forces that leads to the formation of miraculous scenes.