I'm hoping to get back to Miraslaw Balka's Box of Darkness installation, How It Is in the Tate Modern when it's not so busy. (see video) The experience of being blanketed in darkness as we were herded into the unknown was lost somewhat due to the light pollution from the many phones and cameras in action, despite 'no photography' signs. Not for me the overwhelming experience of Olafur Eliasson's The Weather Project, however it still draws on memories of other times and places. Thought provoking. 

How It Is runs until April 5th '10.