One of a series of photos of architect Daniel Libeskind's Jewish Museum in Berlin.
This is Menashe Kadishman's Shalechet art installation - over 10,000 steel faces cover the floor of the top-lit concrete void like "fallen leaves".
The faces gradually disappear from view into the darkness of the far corners of the room. The open-mouthed faces are roughly cut from thick circular steel plates and they clang and echo heavily when they move as visitors walk across them.
I've included a human figure in this photo to give an idea of the scale of the room.