I've just woken up to a plethora of possible answers that I never would have thought of. This was a much more difficult challenge than I expected it to be.
And the winner is ..... (as usual) ----- evansb
RTAF Don Muang, NE of Bangkok. It used to be BKK International, until Suvanabuhmi opened. Some more information and old pictures here:
The Royal Thai Air Force [eng] : : History of The Royal Thai Air Force
and some more info here, including a nice picture of a Breguet 14, which I hadn't heard of before:
thaishortstories.***/2007/12/briefer-history-of-royal-thai-airforce.html
For ***, substitute b l o g s p o t . c o m (with no spaces).
I have to make time to go to the museum, next time I'm in Bangkok
As Sycamore points out, the distinctive road and canal pattern is very obvious on Google Earth:
It is interesting that this (NW) side of the airport is now the civil side. The present day military section is out of frame to the left on the other side of 21L.
My next clue was going to be about QANTAS and golf courses:
