Presuming that the aeroplane at the front right of the picture is a Curtis Pusher replica, I would tend towards the U.S.A.
Now taking a further step. Cole Palen at Old Rheinbeck ( "Planes of Fame) in NY State had a Curtis Pusher replica as well as a flying "Spad" and "Avro 504" among others in the 50's.
As , presumably these would not have made long trips together far from home, it could be that we are looking at an airfield in the North East of the U.S.A. ( near or in New York State?).
Last edited by Haraka; 31st Jan 2015 at 15:09.