It's designed by Olafur Eliasson and Henning Larsen Architects and it's a concert hall in Iceland. It's so gorgeous I am thinking of moving to Iceland to take in some opera!
It's made up of lots of pieces of glass which are meant to mimic crystals, and as the different pieces of glass reflect the light, the building shines and sparkles and changes colours. Also in the evening it is lit up with a warm glow. sigh.
I am in love.
(I got the pictures from here)