Like the natural beaver's lodge, an addanc's lair can only be accessed from below the water's surface. The structure within is a truly gruesome scene. The creature uses the possessions and remains of its victims for decoration, and the stench of decay permeates the entire lair. The adjoining dam is composed of heavy tree branches; logs with long bones of larger prey are interspersed to shore the structure. A typical addanc lair is between thirty and fifty feet in diameter and rises about fifteen feet above the surface of the water.