Since you posted in the Center Harbor forum, I'll guess that's your destination. Nearby is Castle in the Clouds, which is beautiful. Moultonborough-Center Sandwich-North Sandwich-Tamworth-Chocorua makes for a lovely drive. You could head up to Franconia Notch and/or other White Mountain locations.

But a lot depends on how much time and inclination you have to tour. You really need to give us more information.

On the way up, eat lunch at the Tilton (Tilt'n) Diner at exit 20 ff I-93.