Chicago River, architectural boat tour, daytime, sunny weather, clear blue sky, cityscape, skyscrapers, Willis Tower, reflections on calm water, vibrant green trees lining the riverbank, tour guide standing at the bow of the boat, microphone in hand, pointing out landmarks, passengers seated comfortably, wearing casual summer clothing, sunglasses, smiling and taking photos, boat's white canopy, wooden deck, life jackets stacked neatly, gentle wake behind the boat, soft ripples on the water surface, panoramic view, 3/4 composition, warm natural lighting.