Fuller Lake is a deep and refreshingly cool lake on a hot summer day. Once a quarry near Gardners, PA, Fuller Lake now draws crowds to Pine Grove Furnace State Park for swimming, picnicking, hiking, and lots of woodland fun. In October, Fuller Lake is the site of the popular Fall Furnace Festival with music, hayrides, arts and crafts, and pumpkin carving. The event is capped off with a ghost story told by the light of hundreds of glowing jack-o-lanterns floating on the lake.