Hollow Bastion is dominated by a castle which was, once was the world's seat of power. A peculiar series of clockwork and magic run bizarre and lifts which are used to traverse the castle. Underneath the castle entrance are a series of waterways which provide plumbing throughout the castle, as well as the dungeons. Aside from the castle itself, there is a town at its foot which is the base of operations for the Hollow Bastion Restoration Committee.