No, not without leprechauns. That would be awful and immersion breaking. But small touches like rainbows after storms or even after morning dew (supposing its the right season and everything), auroras, and other things like that, help the feeling of it being a vibrant, living world.
Not just rainbows. For instance, when we have a fire burning in the fireplace there would be smoke coming out of the chimney? *sigh*