Rainbows are beautiful.  Double, or single.  Once I saw one on the highway over from a road – the end of the rainbow – it was huge – that one end spread fully across the whole lane.  True story, and the first time I’ve ever seen the end of a rainbow.  Smaller rainbows can even be seen high in the sky, whether amongst clouds and sun, or, on a day that is essentially clear, but where there must be water droplets up above.