Face sculptures

I've seen many public artworks that are big heads. I've seen several that are faces (or masks, or even deathmasks I suppose). My favourites are like this one that I saw last weekend in Burghley gardens, with holes instead of eyes.

Here's what goes on behind the mask. Depending on the light conditions you can see another face.

This is in the middle of Krakow. It's called "Eros bound" - the face has bandages around it. Two people can put their faces in the eyeholes and be photographed.