Antony Gormley: Blind Light
Just in case you've been locked in a cage or blindfolded for the last week (hey, who are we to judge?), Antony Gormley has been scattering the rooftops of the South Bank with dark, life-size casts of himself. The figures, titles Event Horizon, emanate a sense of calm mystery and pensive stillness - a wonderful gift in this hectic city of ours - but if you've been wondering what Gormley's ego-fellating sculptures were all about, they're a part of his first major London exhibition, which is now open at the Hayward and really is a must-see.

Flytower
I have always found it comforting that one can identify not only one's city, but often also one's district by the particular shade of grey that permeates it. Paris is a different shade to London, Brixton to Brick Lane. And now, the National Theatre, that most iconic slab of grey by the riverside is being subverted in a refreshing and curiously touching work as Heather Ackroyd and Dan Harvey, veterans of such organic artistry, have laced its exterior with a layer of grass seedlings. Stop in whenever you can as, from day to day, that unique block of grey will recede into a perfect vertical lawn of luscious green. Well, at least all this rain can be put to use...

Stay Forever and Ever and Ever
The realm of memory is a curious land. Lacking the linearity and consistency of the present, it often functions under its own rules: important facts lost in a flash, a childhood game resurfacing at the most peculiar time. Andrew Renton curates this is exhibition of international contemporary artists that probes gently, sometimes profoundly, at our relationship with the past. Whether it's Abraham Cruzvillegas's tottering web of mementos or Georg Herold's scientific display jars, the past is plucked at, sometimes more successfully than others, as we are left to ricochet around a space as un-unified and somehow muddled as our own poor minds.