In the 1970s McAlpine and Terry constructed various follies in the grounds of the house. One of these, a 50 feet high column topped by an elaborately carved design bears a Latin inscription declaring that "this monument was built with a great deal of money which otherwise someday would have been given into the hands of the public revenue". McAlpine also constructed a classical triumphal arch topped with an obelisk that bears a plaque dedicating the arch to the "first lady Prime Minister of Great Britain". Other features placed by McAlpine and Terry in the folly garden include a "trompe-l'œil" Nymphaeum, a smoke house, an "eye catcher", Chinese cow sheds and an island gazebo.