descol It isn't on Trinadad.
I'm suprised there haven't been more "guess the island".
I haven't wanted to post any more photos as i think they would give it away.
Clue: Further west than any suggestion so far and the the "runway" in the picture runs NE/SW, more like a taxiway today, with the runways running more E/W and N/S (although not exactly on these headings).
On GE looks very run down now.