boulders canada conifers current fast flow forest landscape natural nature rapids river Rockies rocks Rocky Mountains trees view water blue british cloud England english Great Britain sky thames tree uk Windsor bank Devon graze grazing meadow pasture peace spring tranquil united kingdom bridge Cadover Bridge environment Plym summer wild placid sallow sleepy glacial glacier green hillside mountains norway norwegian snow snow melt steep valley city Craigowl dundee estuary fields oil rail railway rape rural scenery seed Tay yellow bushes calm clouds countryside park quiet rivulet widerass farm field flood flooded Hampshire January winter