Grey Towers National Historic Site, also known as Gifford Pinchot House or The Pinchot Institute, is located just off US 6 west of Milford, Pennsylvania, in Milford Township. It is the ancestral summer home of Gifford Pinchot, first chief of the United States Forest Service (USFS) and twice elected governor of Pennsylvania. Today it is open to the public for tours and hiking on its trails. It is also home to the Pinchot Institute, which carries on his work in conservation.