Liberty Memorial Building
Before the North Dakota Heritage Center opened, this building housed the state museum (it is now a library). It was basically in the back yard of my childhood home, and at one stage of life I visited the museum nearly every Saturday. We knew every exhibit, but favorites included the gun room, the dentist office, the Battle of the Little Bighorn display, the dioramas, and the room with the portraits with eyes that followed you around.
On the North Dakota State Capital grounds, Bismarck, North Dakota.