autumn bridleway countryside England english exercise fall footpath forest Great Britain green lane leaves natural nature path rural shade shadows shady Sussex trail travel trees walk woodland branches calm canal February peaceful reeds reflections river sky still sunny towpath track tranquil water winter Betula birch holly ilex peace quiet ramble shadow sunlight country field grass hike hikers landscape madow meadow South Downs summer walkers destination direction exposed heather hill hillside journey moor moorland remote spring tree Trek view wild wood activity boulder cloud colorado cumulus debris fun hiker hiking mountain rock rocky rugged usa walker walking explore farmland natural environment oak pasture public right of way disused estuary line Mawddach railway wales welsh