How much soil and grass have we lost from the top of Calton Hill? Judging by aerial photographs, most of the deterioration happened in the past five or six years. (The picture illustrated dates from 2008).
More photographs are available for the hill in 1996, 2000, 2005, 2009, 2015, and 2023, see Erosion on Calton Hill, including aerial photographs, 1996 to 2023.