It wasn’t just one building. The doors they’d used might’ve opened onto nothing, but on the other side of the building she saw something very different. It was an entire town built on four or five different terraced layers of cloud, not connected by anything more than thick tethers of braided rope. Each layer seemed to be drifting semi-independently of the others, some with houses, some with shops, but the largest with a single gigantic building, easily as large as the other clouds combined. Huge cooling towers rose above it, and James could somehow feel the air being drawn inside.