The architects of the castle, Boals, and Harnois of Denver designed a third-story tower-like room they named the Aviary. Original bird and leaf wallpaper cover the domed ceiling of this bright and sunny room. A “dormitory” is attached to the tower room, presumably for the children of guests. Osgood did not have children with any of his three wives. The suite is 502 sq ft and sleeps two people in one queen-sized bed. There is not a television or fireplace in this suite. A number of stairs are required to access the suite.