All the land was sold out of the Talbot family in the mid 20th century .
It has been preserved as Margam Country Park , an estate of some 850 acres ( 3.4 km ) owned and administered by the local council which is a major local attraction .
All the land was sold out of the Talbot family in the mid 20th century but it has been preserved as Margam Country Park , an estate of some 850 acres ( 3.4 km ) owned and administered by the local council which is a major local attraction .