Rebecca Horn in Unna Zentrum für Internationale Lichtkunst (Centre for International Light Art)
The world’s only museum for light art is situated in Unna, a small, sleepy town in the Ruhr. Hard to find, because the entire museum is underground. 30 feet deep in the storerooms of a former brewery. The door through which visitors enter is very inconspicuous. You enter the dark corridor uncertainly, until you go into the first room and are carried off into a breath-taking world of light. Olafur Eliasson, Joseph Kosuth, Christian Boltanski and James Turrell have created site-specific installations there.