Guggenheim Museum Bilbao, modern art museum, flowing curvaceous design, titanium panels, glass atrium, grand staircase, open floor plan, natural light pouring in, river Nervión waterfront, cityscape, Abandoibarra Park, evening atmosphere, soft golden lighting, dramatic shadows, 3/4 composition, low-angle shot, symmetrical architecture, brutalist structure, industrial materials, contemporary art pieces, visitors walking, interacting with installations, blurred motion, abstract reflections.