chalk coombe Devil's Dyke dry England Great Britain landscape natural nature path South Downs Sussex track valley cloud english green hillside meadow rural shadow spring stormy sunlight weather beautiful beauty common spotted orchids Dactylorhiza fuchsii flowers quality slope wild blue clouds countryside down exercise footpath forest hills sky steep summer trail travel trees walk woodland yellow dropwort Filipendula vulgaris plants white farm field grass hill panorama peace view village bridleway cycle cycling cyclist mountainbike sport Trek