cave inside a mossy red granite and Opal canyon, fusion of neoclassical and neobrutalist architecture, lush nature, crystal clusters, flowers of hope by Jean-Honoré Fragonard, river waterfall, mushrooms and fireflies, winding staircase path, by marc simonetti, natural volumetric lighting, realistic 4k octane beautifully detailed render, 4k post-processing --ar 3:5