Did you hear? Someone went and dumped heaps of refuse at Federation Square. But they did it in such a splendid way (and with permission) that Green House is a destination unto itself – never mind the galleries and cafes on permanent offer. Designer Joost has created a venue made entirely of found objects (traffic signs, packing crate, straw bales and the like) and installed a full commercial kitchen, which uses produce from the rooftop garden – also made with recycled materials. It’s strangely beautiful, like dropping through the rabbit-hole into stagey surrounds that look almost normal and suspiciously attractive. It’s up until 29 January at which time it disappears completely, leaving nothing – no waste or evidence of its existence. If you ever needed an argument that living consciously can also be damn good looking, here it is.