Octavia Hill herself include a monument to her at a Surrey beauty spot, on the summit of a hill called Hydon Ball (now owned by the National Trust). Shortly after her death, the family erected a stone seat there, from which walkers can enjoy views over the Surrey countryside. The Octavia Hill Society was set up in 1992 "to promote awareness of the ideas and ideals of Octavia Hill, her family, fellow workers and their relevance in today's society nationally and internationally". Under the society's auspices her birthplace at Wisbech has been turned into the Octavia Hill Birthplace Museum. In 1995, to
National Trust for Places of Historic Interest or Natural Beauty under the Charities Act 2006. Its formal purpose is: The trust was founded on 12 January 1895 by Octavia Hill (1838–1912), Sir Robert Hunter (1844–1913) and Hardwicke Rawnsley (1851–1920), prompted in part by the earlier success of Charles Eliot and the Kyrle Society. In the early days, the trust was concerned primarily with protecting open spaces and a variety of threatened buildings; its first property was Alfriston Clergy House, and a decorative cornice there may have given the trust its sprig of oak symbol. The trust's first nature reserve was Wicken Fen, and its first archaeological monument was White Barrow.