Craft an abstract wall art visualizing horses against the backdrop of tropical North Queensland, combining natural and urban elements. Emphasize mountains, creeks, and a harmonious cityscape using organic shapes and muted geometric forms in a palette of green, yellow, orange, and blue. Ensure the design, with an aspect ratio of 16:9 , reflects the tranquil coexistence of the natural and urban, perfect for a corporate environment. --ar 16:9  --s 750