From my recent trip to Berlin. @JewishMuseum
The Memory Void, one of the symbolic spaces on the ground level of the Libeskind building, includes the installation Shalekhet (Fallen Leaves) by Menashe Kadishman. More than 10,000 faces with open mouths, cut from heavy round iron plates, cover the floor of the ground floor void.
Visitors are encouraged to interact by walking on the exhibit itself: to see the open-mouths in terror, the faces of soundless screams; and to listen to the jarring clanging sounds when thick metal pieces jostle against other pieces.