As Pilsworth's hidden building is the only place i know of that cannot be seen on Street view i decided to google it and see what came up and i found this...
on this site there is houses that cannot be seen eg. 2207 Seymuor Avenue, Cleveland, Ohio, which was the home to a horrific series of kidnappings. Princeport Road in Stockton-on-Tees, but it is not clear why it has been bluured out.
Even through finding these places i cannot find where the other buildings that are 'hidden' as obviously, they have done it well. Obviously this is something that you have to be told off like i was about the building in Pilsworth.
Possible idea??? Go and take images of this building as Hinterland (our theme for the exhibtion) is an area lying beyond what is visible or known.