I saw an absolutely stunning rainbow on the way from Cavan to Maynooth today. It was complete and vividly bright at both legs. For a while there was also a secondary bow around it and you could clearly see that the colours on the outer bow are in the reverse of the colours of the inner one. If you’re curious as to why that is checkout the section on rainbows at my favorite Atmospheric Optics site. I also saw some amazing Crepuscular rays about half an hour later.