I stopped off at Tate Modern yesterday to escape the rain and to see the inside of the new (and not 100% completed) Switch House extension for the first time. This was my choice of view from the terrace on the tenth floor, although most of the other visitors seemed to be more interested in looking through the windows of the apartment blocks which seemed to be almost within touching distance. I also dropped in on the Georgia O'Keeffe exhibition and was a little disappointed not to see more of her landscapes which featured in Alan Yentob's excellent Imagine programme broadcast in July (and still on iPlayer here). I hadn't realised until watching it that O'Keeffe had been married to Alfred Steiglitz, the pioneering fine art photographer, and I'll admit that my main reason for visiting yesterday was to see some of his prints from their time together. Whatever point of view you choose, the exhibition runs until 30 October.