You would want to combine this with other activities since this place, although interesting, is not a place you'd want to spend more than an hour at. I suggest lunch at the Yankee Smokehouse in West Ossipee, jct of rt 25 and 16. Try the smokehouse ribs. Yum. They're better than the baby backs. It's not too far from the boulder.
http://www.newhampshire.com/state-pa...ural-area.aspx