The walls of this particular building were made of an enchanted vellum and hardwood, to trap in the steam that the springs let off from their gentle and hot waters. In the building, there were three massive springs, arranged in an upside-down V, with the same walls cutting them off, doors in the middle of all three. The pits themselves were about twenty feet in their diameter each, with a depth of ten feet at the deepest point and a depth of three at the very edge. They hadn't been altered in any way, just built around. The water was clean and transparent, but the rooms were filled with steam, and the inside wall of the vellum coated in condensation.