cloud crop farm farmhouse farmland field gate hedge hills landscape Powys sky view wales welsh winter cottage forest green hill meadow rural trees valley cold lane muddy track wet bleak bracken brown hillside natural nature rugged rusty tawny fence countryside direction peaceful quiet road tranquil transport travel tree verge bridleway exercise path slippery snow steep trail Trek walk arch architecture bridge Crickhowell current flow Great Britain historical old river stone united kingdom Usk water dead golden stems