The following four are all located in the Manor of Eia, the official estate of the Master of the Horse,

(a) The Reformers' Tree 
(b) A statue based on a horse-tamer made of the metal of guns captured at 19th century battles  
(c) The Standing Stone, claimed to have been brought from Stonehenge by Charles I.  
(d) A memorial to Caroline, wife of George II. Just one question though - what is this area called today?