Majestueuse cité sous-marine sous un vaste dôme de verre cristallin

**MidJourney Prompt:** *A majestic underwater metropolis hidden deep within an immense ocean canyon, protected by a colossal crystal-clear glass dome. The city blends breathtaking futuristic technology with magical fantasy architecture — soaring crystalline towers, elegant organic structures, floating bridges, glowing runes, shimmering energy spires, and bioluminescent gardens. Soft rays of sunlight filter down from the distant ocean surface, barely piercing the deep blue water, while the city radiates its own enchanting turquoise, sapphire, and golden light, illuminating the entire canyon from within. Giant canyon walls are covered with colorful corals, glowing sea plants, ancient ruins, and luminous crystals. Schools of exotic fish, graceful manta rays, sea turtles, and enormous whales swim peacefully around the dome, emphasizing the city's epic scale. In the foreground floats an extraordinarily beautiful mermaid with long flowing iridescent hair, shimmering scales, and an elegant crown made of pearls and coral. Beside her swims a magnificent giant seahorse, majestic and noble, serving as her loyal companion, adorned with ornate golden armor and glowing magical ornaments. Their presence creates a sense of wonder and guardianship over the hidden city. Ultra-realistic, cinematic fantasy sci-fi, epic worldbuilding, masterpiece, hyper-detailed, photorealistic, volumetric god rays, ray tracing, global illumination, ambient occlusion, atmospheric perspective, bioluminescence, magical realism, Unreal Engine 5, Octane Render, 8K, breathtaking composition, vibrant colors, sharp focus, award-winning concept art --ar 16:9 --stylize 500 --v 7 --quality 2