Pennsylvania State Parks: This imposing stone structure is a small part of the furnace at Greenwood Furnace State Park, Pennsylvania.
Pennsylvania State Parks: Surrounded by illuminated autumn-colored leave, people enjoy a picnic at Greenwood Furnace State Park, Pennsylvania.
Pennsylvania State Parks: A couple enjoy the view of the lake at Greenwood Furnace State Park, Pennsylvania.
Pennsylvania State Parks: The remains of the furnace, an imposing stone structure, is surrounded by tall spruce trees at Greenwood Furnace State Park, Pennsylvania.
Pennsylvania State Parks: Headstones form the 1800s are surrounded by fallen leaves, autumn-colored trees and a picket fence in the cemetery at Greenwood Furnace State Park, Pennsylvania.
Pennsylvania State Parks: A mountain and beach are the background for a scenic dam, spillway and tower at Greenwood Furnace State Park, Pennsylvania.
Pennsylvania State Parks: A stone spillway and bridge are surrounded by trees at Greenwood Furnace State Park, Pennsylvania.
Pennsylvania State Parks: A hiking trail clings to the side of a mountain at Greenwood Furnace State Park, Pennsylvania.
Pennsylvania State Parks: Visitors read a wayside exhibit at the iron furnace at Greenwood Furnace State Park, Pennsylvania
Pennsylvania State Parks: The spillway and an angler are mirrored in the lake at Greenwood Furnace State Park, Pennsylvania