
There’s one in South Dakota, and one in Virginia. Take your pick.
But first read this article:
http://www.independent.co.uk/travel/americas/south-dakota-all-the-presidents-heads-811624.html
The two parks:

OR visit the artist’s studio warehouse in Houston Texas !!!
http://i5.photobucket.com/albums/y163/emborsky/PB180795.jpg
http://www.flickr.com/photos/rkimberly/sets/72157600858583345/