Before the 20th century, the original house was lost, but the foundation outlines of Washington's house are marked. The public park was established in 1930 and in 1931 a memorial house was built in historicist style to mark the site and to represent an 18th-century tobacco plantation. The historic park opened in 1932, during the Great Depression. At the entrance to the grounds, now maintained and operated by the National Park Service, is a Memorial Shaft obelisk of Vermont marble; it is a one-tenth scale replica of the Washington Monument in Washington, D.C.