I had the chance to see the Elmgreen & Dragset exhibition “This is the first day of my life” when I was in Malmö last week. A very effective way of transforming the space:
“Upon entering Malmö Konsthall, the spectator is confronted with a long blank white wall and a series of anonymous-looking doors. Some of the doors are dysfunctional and can’t be opened; others will lead the viewer through a complex environment of secret rooms configured in a labyrinthine system.” From the catalogtext.
This reminds me of descriptions of some of Mike Nelson´s work, which I havent had the opportunity to see unfortunately.
I recommend reading an old interview from the Guardian, where his work is described as creating “emotionally charged false buildings within buildings”.