Situated on the lower slopes of Slieve Coilte, is a 620 acre estate planted wit over four thousand varieties of trees and shrubs. The estate is dedicated to the memory of President John F Kennedy, the site was chosen because of its proximity to Dunganstown near which stood the ancestral home of President Kennedy's great grandfather who emigrated to America.

The present castle was built in the 1820's by John Knox Grogan with additions by Hamilton K Grogan-Morgan in the mid nineteenth century. The castle is now the headquarters of the Irish Agricultural Institute its chief use being for soil research.

A nearby block of neo-Gothic farm buildings house the agricultural museum. Its many rooms contain excellent displays of power driven barn machines, carts and traps, wheel wright and carpenter workshops, a blacksmith shop, a shoemakers shop, a harness makers shop, as well as a collection of Irish country furniture.

The site is beautifully situated on the edge of an artificial lake surrounded by fifty acres of parkland.