Ominous Tynemouth Cliffs

This is a very interesting picture. Upon first view I wondered what are the structures? They resemble a roman aqueduct but apparently are some sort of reinforcement for the seashore. Selection odf an intersting subject is always key for a great pic!
In any case many wonderful colors are present. The ocean adds another great texture and the sky adds a bit of foreboding to a calm and serene picture. The green at the bottom is curious, is this a mold or a plant?
In any case, I say Great Job! I really like it and I hope others will as well!