I hadn't heard of ice rainbows before, but apparently they're quite rare. What's even rarer, apparently, is photo evidence of one. Photographer Reyaz Limalia spotted it while driving in the English countryside, and almost crashed his car because of it.
Technically, however, ice rainbows aren't actually rainbows. While traditional rainbows are created when light is refracted through a raindrop, ice rainbows are caused when light goes through high altitude cirrus clouds when the sun is high.
Pretty spectacular, isn't it? [Daily Mail]