The park consists of mixed woodland, gardens, walking trails and coastline with views of the Antrim Coast and North Channel.
The presence of antiquities such as shell middens and Droagh motte show that there has been human habitation within this area going back hundreds of years.
However it was not until 1823 that the Agnew family obtained the lease to this fertile land from the Marquess of Donegall and began farming in the area.
In 1878 'Seaview' was sold to Mr. Stewart-Clark, a wealthy Scottish textile industrialist, who had married a local girl, Miss Annie Smiley and required an Irish residence.
When Cairncastle Lodge's last owner, Mr. William Chaine, died in 1937 leaving no children, the land was sold and merged with Sir Thomas and Lady Dixon's property.
The land was separated again in 1947 when the Dixon family generously donated Cairndhu to the Ministry of Health and Local Government.