Sisemens Gazelle pic is:
Cadenas (Top) OP in the most SW point of the country. Cadenas (Bottom) was a clearing at the bottom of the hill whose approach and departure was limited by the border and whose surrounding trees had evidence of how tight it was on the tail rotor. I think I am right in saying that this is the OP in which a AAC Bell 47 Sioux was written off, but others older than I may be able to clarify that.