Holloway Sanatorium was an institution for the treatment of those suffering temporary mental illness, situated on 22 acres (9 ha) of aesthetically landscaped grounds near Virginia Water, Surrey, England, about 22 miles (35 km) south-west of Charing Cross. Its largest buildings, including one listed at Grade I, have been restored and supplemented as Virginia Park, a gated residential community featuring a spa complex, gymnasium, multi-purpose sports hall and an all-weather tennis court.