countryside England english farm field flowers gate Great Britain green hedgerow landscape natural nature peaceful plants rural sky spring Sussex tranquil verge wild blue bluebells exercise footpath Hyacinthoides non-scripta path track trail trees Trek walk woodland autumn bank branch color colour fall forest leaves trunk lane pink red campion road roadside Silene dioica umbellifers white cliff face flower flowering plant groundcover herb petal plant purple rock Terrestrial plant thyme Thymus serpyllum wales welsh cornwall fast flowing hillside Natural landscape Riparian zone rocks stream water water resources watercourse waterway background coast colors colours Cornish eroded erosion pebbles pool smooth stones texture underwater worn bushes Calluna flora Frensham Common heath heather heathland ling summer Surrey