In reply to mypyrex:
Refuge de la Noire ou Barelli-Pivano Fauteuil des Allemands the little bivi hut below the Aiguille Noire de Peuterey. Just for it's position up it that fantastic cirque, just getting there is diff.
The old Laboratoire des Cosmiques the one that burnt down was an interesting place as well, it was built around the rock it stood on. The corridor went along a bit up two steps along a bit down three steps and so on.
In Austria there was a bivi hut in the Glockner area called the Gruberscharte bivi its an orange fibre glass octagonal box on scaffolding. You enter up a ladder to a trap door in the floor, it's a bit like the Lunar module. I don't know whether it's still there but it was quite fun.
Also the Cabana Veronica in the Picos de Europa, which is made from an old raydar dome from an American war ship.
Post edited at 14:12