The Wolfsburg Art Museum exhibits multiple installations by Hans Op De Beek, still on until September 3rd, and very worth visiting (even for me, who is not very much following such art installations normally). I liked the multiple levels of space and time, wondering through while walking along. You may enter through an installation called "The Collector's House" and then continue into the main exhibition hall, descending a staircase. It is rather monochrome and dark down there, and time stands still in a way. I really had no sense, of how long I was walking through the alleys, and there is also no obvious way out. You have to find the hole in the fence.