cornwall England english Great Britain Kit Hill landmark landscape location marker orientation pillar stone Trig point architecture clock elements gnomon historical measure old sundial Sussex time wall arch beach cave coast Cornish erosion formation natural nature rock sedimentary artichoke blue Cynara flower flowerhead garden head mauve petals purple summer vegetable Anthus petrosus bird feeding rock pipit daffodil narcissus spring trumpet wild yellow Corydalis flowers fumitory wiltshire entrance exit field gate path road rural small way wicket wooden blackthorn blossom bush Prunus shrub white Acer bonsai dwarf leaves miniature pot plant RHS tiny tree Wisley crops farm fields hill panorama plain trees view Weald