angles appearance background beams below beneath bridge concrete deck girders light lower lower-deck perspectives piers pillars reflections secure solid steel strength strong structure structures surface surfaced surfaces texture textured textures thick under undercover water abstract blue nature ocean reflection rock rocks saavem sea seaweed sun wave waves calm clouds horizon lake mirror sky color colour cool cooling edge lakeside lighting mirrored natural-environment natural-landscape nature-reserve outdoors outside park peaceful placid pond protection public reeds reflecting restful ripples rippling shade shadows sunlight sunshine tranquil tranquility trees vegetation water's-edge autumn serene silence silent summer wiev green meteorology ripple wheather wind