A vast heroic fantasy valley, immense in scale, completely enclosed by a circular chain of towering mountains forming an unbroken barrier. Bright summer day with lush green forests, clear blue skies, and sunlight illuminating the landscape. At the center of the valley, a modest medieval castle with intricate architecture, blending subtly into the scenery. Many tall, mysterious towers rise above the forest canopy. Ancient stone ruins are scattered throughout the forests and open areas. A wide, winding river flows through the valley, joined by serene lakes reflecting the sunlight. Captured from a high vantage point in an extreme wide shot, detailed and immersive.