Beautiful Crystal Covered Apartment
Copper-sulfate crystals are lovely with their rich blue color. So lovely that artist Roger Hiorn completely covered the inside of an apartment in London with them. This was done by sealing it and pumping in 75,000 liters of supersaturated solution. After it had cooled and been drained off, the doors have been opened for visitors to come in two or three at a time.
This can only be done since the apartment was set to be demolished. Stop by before it closes on Nov. 30 and gets destroyed. Link