Located in Heritage Court Park, the museum is housed in the Wiliams Free Library founded in 1890 by John J. Williams, a prominent citizen of Beaver Dam.

Operated by the Dodge County Historical Society, exhibits detail the development of the area. Railroad buffs will want to visit the neary depot (1901). Historical artifacts and displays, include an authentic one-room school house, extensive military display, Victorian era furnishings and dress, early farm life display, and a "classy" 1902 Rambler.