Rainbow, Glencolmcille, Co. DonegalA full double rainbow arching over the moorland above Glencolmcille. The rain had just passed through, leaving the granite outcrops dark and wet, and the tussock grass lit up where the sun broke through from the left. That combination of storm light and clearing sky is what makes rainbows like this so vivid, but getting both arcs complete from base to base is genuinely rare. The Donegal hills here are exposed and open, nothing but rock and grass