I was pleased to find out that there was an Andreas Gursky exhibition in Melbourne while we were there. I first encountered Gursky's work in 2000 at the Tate Modern. According to Wikipedia, Gursky is "a German photographer known for his enormous architecture and landscape color photographs, often employing a high point of view." That seems pretty accurate.
One of the neat things about his work is that you can't really appreciate the art without going to the gallery and seeing the "originals". The sheer scope and detail of the work is impressive in a way that can't be reproduced online.
I've now seen around 25 of his works, out of a total of around 100 in his career, so this was a good chance to appreciate the breadth of his career.