From Wikipedia: http://en.wikipedia.org/wiki/Castle_Coole

Much of the native oak woodland remains, although a considerable portion of the estate has been historically given over to agriculture and let to local farmers, a practice which continues today. Numerous out-buildings can be found on the estate; those of interest include a 'Grand Yard', a general workplace housing stables, a 'Tallow House' (originally used for candle-making, now a gift shop and reception area), a 'Servants Tunnel' leading ultimately to the basement of the mansion and the only route from which servants could enter and exit the main building, a 'Laundry House', a 'Dairy' and an 'Ice House'. A 'ha-ha', a sunken ditch to control livestock movements without the disturbance on the landscape resulting from a fence or a wall, can be found near the mansion.