45th Infantry Division Museum

 The museum is the nation’s largest state operated military history museum depicting the military history of Oklahoma and the 45th Infantry Division. With displays from 1541 through Desert Storm, the museum includes the country’s third largest collection of historic U.S. military firearms and the world’s largest collection of items once owned by Adolf Hitler.

Open TU-F: 9am-4:15pm, SA: 10am-4:15pm, SU: 1-4:15pm. 
Park closes no later than 5 pm
Admission: Free