The Sunset Trail is a beautiful walk.
Otherwise, drive up to Fuller Lake and mill around there. You can walk from Fuller Lake along a rail trail to the back of Laurel Lake (in fact, the whole way to the base of the Poll Steeple trail).
Drive your vehicle to the Pine Grove Furnace. It's a neat history thing. If you want, stop in at the Applachian Trail museum. It's right above the furnace in one of the old buildings there.
Then another drive- go to the entrance of the Pine Grove State Park campground. Make a left and follow that tiny road as far as you can. It'll take you to the upper-side and an overlook over Fuller Lake. You have to walk past a cabin (it's public land, just don't get too close to their place). It is a neat view of the opposite side of Fuller.