ancient avebury England english Great Britain historical landscape lichens menhir monolith neolithic old pillar stone West Kennet Avenue wiltshire plain arboretum conifer evergreen Ickworth national trust nature park parkland pine specimen trees Suffolk tree architecture border building flagstones flowers garden hedge home house path Polesden Lacy shutters Surrey windows Buckinghamshire Cliveden House clock decorative elements gold grand mansion ornamental ostentatious time tower Cornish cornwall Michael mount rockery saint spring St. Michael's Mount autumn ladies tresses natural orchid orchidaceae small spiral Spiranthes tiny white wild cowslips flower hybrid primrose Primula veris Primula vulgaris Sussex verge yellow alone field hill lone oak panorama Quercus single solitary view Weald winter blue clipped Lamiaceae Nymans Perovskia plants spikes summer topiary