An ancient library hidden inside a giant hollow tree, magical and inviting atmosphere expression, majestic interior view, thousands of leather-bound books on curved wooden shelves, spiral staircase winding up through the center, glowing fireflies floating between bookshelves, worn reading chairs with velvet cushions, interior of a massive ancient oak tree in enchanted forest, hidden realm, mystical, warm and cozy atmosphere, autumn, with scattered scrolls and quills on oak desks, mystical runes ...
