The Large Furnace is a robust, industrial-sized metal structure designed for high-temperature operations. It features a cylindrical main body with a domed top, constructed from thick, rusted metal plates welded together, showcasing visible seams and bolts. The front has a large, hinged door with a heavy latch mechanism for loading materials, and a series of vents and pipes for airflow and exhaust. The base is wide and sturdy, ensuring stability, with a charred and soot-covered exterior indicating frequent use. The interior is lined with heat-resistant bricks, and the overall color scheme is dominated by dark grays and browns, with patches of orange rust and black soot.