auxiliary bend crossroads isolated junction main priority road roadsign secondary sign turning unusual yellow angles appearance chairs class classroom desks education furnishings furniture high-school learning room school secondary-school students study surface surfaces after the rain Alexander´s band atmosphere boats colors colours double rainbow houses light optical phenomena rain rainbow reflection refraction sea sky bends blue blue sky corners gravel hairpin hairpin bend HDR hills mountain mountain road Nyberg pass path rock rocks stone stones turn turns way ancient balance design dichotomy form history meaning texture arches architecture cathedral christian church decorative doors England english Great Britain LINCOLN ornamental pillars religion wooden