Fantasy castle above a tranquil harbor with sailing boats

Surreal painting with great detail, ultra HDR, detailed. A stunningly fantastical scene with a huge castle on a hill, surrounded by small buildings. Sailboats glide across the calm waters and birds fly overhead. A few white clouds drift across the sky. Volumetric lighting, ultra-sharp focus, crystal-clear sharpness, extreme contrast, visual effects, ultra CGI rendering, 16K, bright, vibrant, fantasy core, magical, hyper-detailed, concept art, dark fantasy. Focused, fantastic realism. Professional photography, realistic and natural, natural lighting