activity boulder cloud colorado cumulus debris fun hike hiker hiking landscape mountain natural nature path rock rocky rugged sky track trail Trek usa view walk walker walking countryside England english exercise explore farmland field footpath Great Britain green meadow natural environment oak pasture public right of way spring Sussex tree disused estuary forest line Mawddach peaceful railway river shadow sunlight tranquil trees wales water welsh chilled chilly cold freezing frozen height high hill ridge snow snowy South Downs summit top white winter ascend ascent climb climbing descend descent diagonal dissect distance downhill farm grass livestock narrow road rural sheep steep straight tarmac uphill viewpoint baked cyprus destination direction distant dry dusty evening lane mediterranean parched plain scattered Weary abundance abundant blue bluebells flowers Hyacinthoides non-scripta many profusion wild woodland bridleway eroded erosion panorama sign Soil summer travel warning wooden country Devon difficult difficulty hardship hedge slip slippery slope telegraph pole uk united kingdom wintry air traffic control airline airplane airport architecture atc aviation berlin command control control tower flight fly holidays plane radar standby tower tower signal tower views tracking traffic