autumn bank branch color colour England english exercise fall forest Great Britain leaves natural nature path Sussex track trail trees trunk walk woodland chalk crop downland farm field grassland hill landscape meadow national park summer view avenue leisure London park parkland pleasure public stroll vista creepy deep eerie footpath green old Surrey Surrey Hills trunks ridge ancient architecture attraction defend defensive Girona high historical long narrow pathway paving Spain spanish stone thin tourist town wall bridleway clouds fence post sky South Downs travel Trek winter