This picture is taken from a section of Holyrood Park that is far away from Arthur's Seat is in probably not visited often. Calton Hill has many monuments, including the National Monument and the Nelson Monument.
https://en.wikipedia.org/wiki/Nelson_Monument,_Edinburgh
https://en.wikipedia.org/wiki/National_Monument_of_Scotland
https://en.wikipedia.org/wiki/Calton_Hill
https://en.wikipedia.org/wiki/Holyrood_Park