The Mattress Factory in Pittsburgh is a museum that is one of the best in the world for installation art pieces. The museum is spaced over two buildings and over 3 levels. A great two room work involved mirrored rooms with one in ultraviolet lights and the other with normal lighting both using spots.
One level featured a completely dark experience with different rooms using darkness and light to create images that seem different in their dimensions as shown in the final photo. I had never seen anything like that and was truly impressed.
If you have any questions about what the work was in any of the pictures please comment below.