Ethereal Gothic cathedral, intricate stone carvings, stained glass windows, grandiose vaulted ceilings, flying buttresses, mystical ambiance, sustainable materials, reclaimed wood accents, low-carbon concrete, recycled metal ornaments, energy-efficient clerestory windows, natural ventilation systems, verdant green roofs, living walls, bio-based paints, eco-friendly upholstery, soft warm lighting, subtle misting effects, dramatic shadows, atmospheric fog, mysterious chiaroscuro.