Roger Hiorns - Seizure (2008):
A condemned London apartment transformed into a copper sulphate chamber.
"After reinforcing the walls and ceiling and covering them in plastic sheeting, 80,000 litres of a copper sulphate solution were poured in from a hole in the ceiling. After a few weeks the temperature of the solution fell and the crystals began to grow. The remaining liquid was pumped back out and sent for special chemical recycling."
by Jason Hallman and Stephen Stum