Permanent Exhibits
Dahl Car Museum:  A collection of vintage automobiles that spans from a 1904 Holzman Car to more modern examples.  Many of these vehicles are still in working condition and are used in parades.
Eagles Air Museum:  More than twenty aircraft are on display dating from 1911 to 1975.  Showcased is “The Governor’s Plane,” a C-47 that was used in the D-Day invasion.  The museum features many planes restored by Charles Klessig, author of My Highway in the Sky, which is for sale in the museum store. 
Horse Drawn Vehicle Building:  Buggies, wagons, drays, hitches, grain binders, and a replica Wells Fargo stagecoach are on display in this building.  Of special note is the horse-drawn hearse from Fredrikson and Brakke funeral home of Davenport, ND.
Law Enforcement Museum:  The Fargo Auxiliary Police Association joined with other law enforcement agencies to furnish and maintain the exhibits in this building.
Main Museum:  Built in 1972, it is the headquarters of the Cass County Historical Society.  It contains permanent, temporary and traveling exhibits pertaining to Cass County and the Red River Valley, including one of the largest collections of American Indian artifacts in the region.
Medical Display:  This building displays a collection of medical and dental equipment from the Nineteenth Century.  The house was donated by the Maier family. 
Melroe Tractor Building:  This museum is named for Les Melroe, founder of Melroe Manufacturing which became Bobcat. It features many manufactures including Case, John Deere and McCormick. 
Moum Agricultural Building:  Tractors, farm machinery, the world’s largest bulldozer, and the first Steiger tractor ever built are all housed in this building.  The building is named for Donald Moum. 
Telephone Museum:  This museum is housed in the former hardware store building from Tower City, ND.  The Telephone Pioneers of America Museum houses historic telephone equipment and provides Bonanzaville with its telephone connections.