Chicago cityscape, 90-minute architectural boat tour, daytime, sunny weather, clear blue sky, Lake Michigan waters, sleek white sailboats, passengers wearing sunglasses, hats, casual summer clothing, holding cameras, excited facial expressions, Chicago's iconic skyscrapers, Willis Tower, John Hancock Center, Tribune Tower, ornate historical buildings, modern glass towers, urban landscape, waterfront promenade, seagulls flying overhead, gentle lake breeze, soft sunlight reflections on the water surface, panoramic view, wide-angle shot, vibrant city colors, detailed architectural textures.