The Castle That Fell from the Sky

From the slopes of the volcano it is visible long before arrival: something enormous, made entirely of metal, half-buried in the ground, surrounded by debris over a wide area. Its architecture is like nothing known. Built by the big-bare-butts and to their scale, it is immense: to an Animal it is labyrinthine, intimidating, almost incomprehensible.

The walls are smooth where they still stand, holed or collapsed elsewhere. The inside is dark, swept by drafts, filled with dull sounds and metallic creaks. Rust has done its work, but something still functions: glimmers linger in certain corridors, machines hum softly behind sealed walls.

Its name comes from its appearance: an iron castle that seems to have crashed to the ground.