We visited the Wright Brothers National Memorial this past May. Very much worth our time.
https://www.nps.gov/wrbr/index.htm
I agree. In addition the museum in Dayton, Ohio, is worth a visit.
https://www.nps.gov/daav/index.htm
My wife and I were there on April 27. Just missed you.
So did we, same time. Excellent National Memorial, we were really pleased.