This may be of the Falklands wrecks, aircraft left in the Peak District or Snowdon, or even a dig you've been on for a wrecked aircraft. There's plenty of stuff still scattered around, particularly on the higher ground areas like the Dark Peaks.
To kick it off, one of Goose's, which I'm sure he won't mind me re-producing here;

Argetine CH-47C
Come on, let's see them, this could be an interesting thread
Steve