Structurally the winding path is the keystone of the composition, as it’s the essence of the most important trans-cultural metaphor in all languages: “Life as Journey”!
The lighthouse, as a vertical line, stops our exploring eyes, dead. The horizontal line of the sunset and clouds finishes the picture with balance and counters rotation effects of the curved driveway.
Your composition is so superb and satisfying!
….and it does, indeed work well as a postcard!
Asher