£55,000 in 1939. Bishop Plunkett retained Sybil Hill as a private residence with 30 acres (120,000 m²) of parkland, and it was later sold to the later became the site of St Paul's College, Raheny. In 1952 St. Paul's College acquired an additional 14 acres of Corporation lands, behind their school, to use as school playing fields. During the Second World War, Dublin Corporation encouraged local residents to grow vegetables in allotment gardens in the estate. In December 1943, the main residence of St Anne's was gutted by a fire while being used as a store by the Local Defence Force; the ruins were demolished in 1968. In the meantime, just over of the estate were developed for public housing with the central and most attractive portion comprising about retained as parkland and playing fields. Features The park has a number of features. It is crossed by the small Naniken River, and this, in turn, feeds the artificial Duck Pond. The Guinness family added a number of follies, a walled garden, and the grand avenue. Over the last fifty years, extensive walks, a famous Rose Garden and newer miniature rose garden, and Dublin's city arboretum, the Millennium Arboretum, with 1,000 varied trees, have been added. Within the last decade, Dublin City Council has been restoring parts of the Naniken River to its natural state, creating wildlife habitats and wildflower meadows, and improving the path system. They removed some 1970s interventions, including a secondary pond and some rockery walks, partly due to problems with maintenance and partly to open up a vista from the James Larkin Road. The park management also increased car parking to alleviate traffic congestion in the surrounding neighbourhoods of the popular park. Follies St. Annes is known for its follies, of which there are approximately ten, mainly around the Naniken River. The follies include a Herculanean Temple on a mock-ruined bridge abutment along the little river, which served as a tearoom for the family, a Pompeian Water Temple of Isis on the banks of the duck pond, and the Annie Lee Tower and Bridge near the chestnut walk. Other follies include the stone covering of Saint Anne's Well beside the duck pond, the Hermitage Bridge, the Yew Circle and Fountain Pool (behind the formal walled garden beside the house), a "rustic cave" and bridge, three rustic archways and a rockwork feature. A "Druidic Circle" of Giant's Causeway