Althorp estate is located to the north-east of London and covers the area over 14,000 acres (over 60 km2). The estate has been the ancestral home of the Spencer family since the 16th century. It was here that a little girl Diana Spencer spent her childhood and adolescence. Little did she know what was in store for her. Ever since she married Prince Charles and became a part of the royal family, Princess Diana had become an object of admiration for her femininity and charitable works. Unaware of her many flaws, people came to adore their Princess and continued calling her "the People's Princess" even after her divorce from Prince Charles. In 1997 she died in a car crash in Paris and was interred on a small island on a lake at Althorp (see below). The estate and house are now open to the public during the summer months, and all proceeds are donated to the Diana, Princess of Wales Memorial Fund.
Fore more information read here.