洞穴內巨大的古城廢墟，有湛藍河流、木船與神殿，陽光從洞頂缺口灑落

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Masterpiece, best quality, ultra-detailed cinematic fantasy illustration of a massive ancient ruined city built inside a giant cave. A wide turquoise river flows through the middle with several wooden boats carrying people. Tall, broken stone pillars and temples line the riverbanks, with sunlight streaming down from an opening in the cave ceiling. Dramatic lighting, hanging vines, and glowing particles create a mystical atmosphere. Highly detailed architecture, water, and lighting. Epic and awe-inspiring composition, best quality, 8K resolution.