One of my favorite, British artist Roger Hiorn converted an apartment slated for demolition in London into a place encrusted with copper sulphate crystal. He achieved this by flooding the spaces with hot saturated copper sulphate solution that form crystals when cooled. Although this piece was done 2 years ago and the building demolished shortly after the exhibition, I find myself coming back to these powerful images over and over again. What an incredible architectural act of sublime beauty. Truly epic.