Samantha Small has an exhibition called Sour Castles at the Canberra Contemporary Art Space Braddon. It is a whole piece. You enter a corridor with several doors opening off it. None of the doors open even the one with a set of keys. One of them has a peep hole through to another work of art. Rater than saying more let me refer you below.
The heart of this exhibition is crisply pictured on her website on the page shown below
stephenrrandall 