Built in the 18th Century, Mount Stewart is a handsome neoclassical house and garden on the eastern edge of Strangford Lough in County Down in Northern Ireland. Once the seat of the Marquesses of Londonderry, the Vane-Tempest-Stewart dynasty, who bought the estate in 1744, this National Trust-owned property is a must-see for anyone interested in history or horticulture or who likes nothing better than to spend time appreciating beautiful and calm surroundings.