This is the site of RCAF Dunnville, Royal Canadian Air Force No. 6 Service Flying Training School, built in 1940-41 to train pilots under the British Commonwealth Air Training Plan. After the war the site became known as "Dunnville Airport", and was a working airport until the windmills were installed in the 2010s. All runways are now closed, as indicated by the "X" on the former paved runway. The hangar at the bottom right is RCAF No. 6 Museum, and the yellow object in the circle between the hangars is the Harvard memorial. In the background is the Grand River and across the river is the town of Dunnville.  The view is looking slightly west of north.  Photo taken from a Cessna 152 aircraft flown by J. S. Bond.
<a href="//commons.wikimedia.org/wiki/User:SteveTheAirman" title="User:SteveTheAirman">J. S. (Steve) Bond</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>