bank bridge calm cloud England english footbridge Great Britain green peaceful placid plant quality reflection relaxing restful river riverside shade shadow sky summer sunlight Sussex tranquil tree umbellifer vegetation water adelaide angle angles arched barrier bright concrete curved handrail lights overpass park path patterns pedestrian perspective perspectives posts protection public park railing rails recreation recreational area river-crossing safety shadows steel sunshine walkway waterway architectural artistic artwork background brickwork bridgework coloring colors colouring colours exterior external foliage gully levels light linear mortar paint painting public secure shelter solid stonework strength strong structure style surface surfaces texture textures trees two-storey two-story wall weathered weathering well-built appearances caged contained cover covered freeway mesh metal protective ribbing roof roofing safe security sheltered support tunnel tunnelled aerial-walkway angled arial-walkway height high higher inclining raised rising sloping stable supported tree-top handrails nature-reserve pedestrians travellers wood