a tall hill with a clock on top of it

There is a cliff side in the White Mountains of New Hampshire called the Old Man of the Mountain. The cliff side looked like the face of an old man carved out of rock. In 2003, the face collapsed and the rocks are no longer there. To keep the site alive, they have a viewing plaza with these face statues you can line up with the mountain according to your height, and view what the cliff would have looked like before it collapsed.