architecture background elements England english flint Great Britain mortar renovation stone Surrey texture traditional wall ancient brick cement course flints moss norfolk old pattern perspective sky stones grass barren border brown diagonal dissect divide drystone heather hill hillside mark Alley architecture.elements climb descend dordogne drop France french historical home house lamp light path slope steep village cumbria dry stone farm farmland fell fields highland hills landscape meadows real estate road thoroughfare travel upland view walls garden green halophyte leaves natural nature plant rosette succulent xerophyte xerophytic arch archway Asia battlements china construct construction fort garrison Great Wall landmark protect protection tourist attraction tree walk walkway wonder