The old man of the mountain

I'm still kind of obsessed by New Hampshire, hearing about it, reading about it... So I decided to do more research about the "Old Man of the mountain". This rock formation is the symbol of New Hampshire, it can be found everywhere, from roadsigns, to stamps, to coins. It has actually collapsed recently, but used to look like a very realistic human face.
Seems to be something very famous in the U.S, but I had never heard of it before...

LIVE FREE OR DIE, of course.