This was brought to my attention earlier in 2017. Somehow it had escaped my radar five years ago when The Hobbit: An Unexpected Journey was released in cinemas. One of the teaser posters from the film features Ian McKellen as Gandalf walking through The Shire. However, on closer inspection, it is clear that the rolling hills in the distance are part of a distinctive view in the wilds of Northumberland. One can clearly see a railway viaduct and ruined castle in the middle-right of the image. This is Edlingham Castle which is located on the moors between Rothbury and Alnwick. A nice little hidden find!
The Hobbit: An Unexpected Journey Teaser Poster (2012)
Edlingham Castle and Viaduct viewed from a similar vantage point