Saw a rainbow

Last evening on my way home after work, I was driving along the expressway and I thought I saw a colourful half circle spanning from the near distant horizon to a hill of forest further. Yes it was a stream of beautiful rainbow. When was the last time I saw one?

It’s not the prettiest rainbow I’ve ever seen defintely, because the air quality is average and it fainted the contrast of the rainbow... but it's the first time I saw something like this near the business of the city.

When I was young, I really loved rainbow. My grandma would cure my curiosity by saying fairies and gods were walking down the rainbow to pick up those 'guai' kids. During those times, the air was so fresh and the rainbows then were really radiant and beautiful. I miss those innocent years. That must be nearly 30 years ago!