From the river that flowed from Eden at the beginning of Genesis to the water of life at the end of Revelation, the Lord has given his people an actual source and not merely a metaphor for how He sustains us, physically, spiritually, and emotionally. The Bible is filled with references to water. Certainly, we can find no more soothing place to sit than by a river, listening to its sounds resonate from ripples to rapids, and seeing its ever changing, never changing flow.
A note on these particular pictures. I arose early in the morning before we left Yellowstone and went into the Park, along the Madison River, for sunrise. To obtain this kind of color, find high cliffs that glow in the early morning or early evening light above a river. The reflection of this light in the river creates the gold effect.