There’s a fountain near my work, and one day – a year or so ago – I saw this beautiful rainbow reflected in it as I walked past. I’ve never seen it since, but last week, as I was passing on a lovely sunny day, I decided to walk carefully around it and try my best to find the rainbow again. I did find it – photo below (snapped on my mobile). It’s not as good a rainbow as the one I saw by accident a year ago, but it does at least show that if you pass a fountain on a sunny day and try enough viewing angles you have a reasonable chance of finding a rainbow in it!
Regarding the photo, I focussed into the distance in an attempt to make the rainbow clearer – didn’t work brilliantly but that is why the rest of the photo is not particularly in focus – this was deliberate.