There is a fantastic exhibition at the Gagosian Gallery at the moment, it opened on October 13th - James Turrell  works in light and in this exhibition there is a mixture of photographic prints from his Roden Crater project, lightworks (looked to me like a portal to another world, I wanted to jump through the wall...) and installations.
I can't begin to describe it, it's incredible so go and check it out if you can.

Also, Emeralds at CAMP in London on the 17th were awesome as always and very different from the previous two times I'd seen them. Very much looking forward to seeing them again at ATP this December.