Arun chalk cliff current England english field flow Great Britain green landscape meadow natural nature peaceful placid reeds river rural Salix summer Sussex tree water willow bare estuary exposed forest hills low Mawddach mudflats sandbars seashells tide tranquil view wales welsh animal farm graze mammal sheep trees bank clouds erosion Gower hill meander Oxbow Pennard Pill sandy sky Three Cliffs Bay valley woodland blue canada Confluence curved evening join light meet meeting merge mountain point shadow shallows shore burst danger fields flood grass lake meadows pond pool spate winter birch evergreen forest.water ice ontario running snow snowfall snowy stream white white christmas calm canal cloud footpath reflection altitude conifers height high montane moon mount mountains planet range Robson rock Rockies rocky steep