Let’s go walk in the park, that’s such an ordinary thing to do, especially if it is a sunny day in winter. The only slightly unusual thing is that the piece of sculpture in the park is an enormous bean-shaped reflecting piece of metal. It is Chicago’s Millennium Park, and the sculpture is a piece by Anish Kapoor called the Cloud Gate. I loved the reflection of the sun on it, and the odd shape of the shadow below it. There is one difficult thing about photographing mirrors: how do you keep yourself out of the picture?