Located on Route 233, just 8 miles from exit 37 of Route 81 is the Pine Grove Furnace State Park. The park is located on the location of the original iron furnace that operated from 1764 until 1895. There are two lakes, Laurel Lake is 27 acres, Fuller Lake is much smaller, about 1.7 acres. It was actually a quarry for the iron works until it suddenly flooded in the 1890's. The quarry equipment is supposedly still at the bottom of this 90 foot deep lake. The water in Fuller Lake is much colder than Laurel Lake, no doubt from the underground spring that feeds it. The state of Pennsylvania bought the iron works and surrounding lands, 17,000 acres in all, in 1913. Most of the land became Michaux State Forest, however 696 acres was set aside for the Pine Grove Furnace State Park.
Much of the original iron works and buildings can still be seen at the site. Many of the park facilities were built by the Civilian Conservation Corp (CCC) during the great depression.
