England english field flood Great Britain green landscape meadow nature plant Salix sallow spring stream Suffolk tree water autumn blooms dahlias flowers garden heads norfolk perennials petals plants red scarlet walled magenta purple background Cornish cornwall cracked geology lines natural pink rock sedimentary texture worn yellow gray grey city fall London park plane Regent's Park space sunlight trees urban beauty color colour golden peaceful russet Sussex tawny branches countryside fence footpath path rural straight track trail winter Balearic Islands eroded erosion formations limestone Lluc majorca Mallorca shapes Spain striated striation