 The Home Park adjoins the northern edge of the more extensive Windsor Great Park , occupying some 5 @,@ 000 acres ( 2 @,@ 020 ha ) and including some of the oldest broadleaved woodlands in Europe . In the Home Park , to the north of the castle , stands a private school , St George 's , which provides choristers to the chapel . Eton College is located within about half a mile of the castle , across the River Thames . 
