Ancient, mystical, abandoned terraria structure, intricate stone carvings, vines crawling up walls, moss-covered roofs, glowing mushrooms, eerie ambient lighting, misty atmosphere, mysterious ancient artifacts, worn-out wooden doors, rusty iron handles, overgrown with ivy, crumbling stone pillars, mystical orbs floating near ceiling, dimly lit corridors, eerie silence, abandoned research equipment, dusty old books, mysterious underground laboratories, warm golden light peeking through cracks.