Iwan Baan has always amazed us with his photos, capturing the essence of several projects around the world. But Iwan has also been exploring with virtual panoramas (I remember some OMA buildings at Domus, included on a CD).
Via @vitra I found that Iwan used this technique on the VitraHaus building by Herzog & de Meuron, which you can now explore from your computer to get a better idea about the spatial relations between these stacked volumes.
Follow this link to take the virtual tour.