Create a high-resolution, photorealistic image of an enchanted forest at dusk, featuring a majestic unicorn. The scene should capture the magical ambiance of the forest with its towering ancient trees, their branches adorned with glowing fairy lights. The unicorn, with a shimmering white coat and a spiraled golden horn, stands gracefully beside a crystal-clear pond that reflects the enchanting surroundings. Around the pond, bioluminescent flowers and mushrooms cast a soft, ethereal glow. Fireflies dance in the air, adding to the mystical atmosphere. The sky above transitions from deep blue to starry twilight, with the first stars beginning to twinkle. In the background, an ancient, ivy-covered stone archway hints at hidden realms and ancient magic. The overall image should evoke a sense of wonder, enchantment, and the timeless beauty of a fairytale world.