Johnston Castle.

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.