access barrier countryside England english exercise fence footpath gap Great Britain green hedge nature neglected overgrown path post ramble rural step stile Sussex track trail walk walking wooden active activities adults care community designed enjoying enjoyment equipment families fitness fun grass lawn leisure move movement moving outdoors park parks planned prepared recreation recreational safety sport sporting-equipment strength strong suburban sunlight sunshine trees variety blue clouds downland field hill landscape meadow natural quality sky slope South Downs summer cliff coastal coastline danger Pembrokeshire plants rocks sea shore steps travel Trek united kingdom view wales wander water welsh chalk distance distant national park Seven Sisters farm lane snow snowy walker white winter disused estuary forest line marsh Mawddach peaceful railway river shadow tranquil walkers hike hiking incline Lofoten Islands mountains norway norwegian ocean remote ridge stones stony wild bridleway cloud hedgerow panorama passing rain storm plateau rocky