Low-angle wide panoramic view of a fantastical city built inside an enormous underground cave, the whole city stretching into the distance so every part is visible. The cavern's vast ceiling and walls of rugged rock arch high above, studded with glittering crystal formations and hanging stalactites. From an opening high in the cave ceiling, a slender, delicate waterfall descends in a thin, graceful silver ribbon, elegantly narrow like a thread of liquid glass, drifting softly as fine mist as it falls and catching the lantern light in shimmering droplets and faint rainbow glints, dissolving into a gentle luminous haze before it reaches a serene mirror-like pool beside the city. The city is a warm cluster of stone and timber houses with steep rooftops, terraces carved into the rock walls, winding stairs, arched bridges spanning the underground river, all decorated with countless lanterns of many different colors — warm amber, soft pink, mint green, sky blue, violet and gold — hanging from ropes, balconies, poles and floating gently in the air like fireflies. The lighting is soft and dreamy: gentle multicolored lantern glow diffusing through the cave air, tender pools of warm and pastel light on stone paths and rooftops, no harsh shadows. The reflections are even more fantastical: the underground river and wet stone mirror the colorful lanterns in long rippling streaks of light, the thin waterfall's mist catches the glow in a soft iridescent haze, rainbows refract from the crystals and dance across ceilings and walls, tiny sparkles of reflected light drift everywhere like floating gems. Everything wrapped in a serene magical haze of deep blue shadow and warm glowing color. Fine dust motes and light particles drift through the air, gentle mist rising near the waterfall and river. Highly detailed fantasy concept art, painterly digital illustration, dreamy pastel-tinged palette, cinematic wide-angle lens, awe-inspiring sense of scale, soft-focus background, sharp detail on foreground rocky ground and nearest lanterns.