Old or Not? Earthwork in the Park
Introduction
The photograph on this page of Old or Not? Earthwork in the Park by Des Blenkinsopp as part of the Geograph project.
The Geograph project started in 2005 with the aim of publishing, organising and preserving representative images for every square kilometre of Great Britain, Ireland and the Isle of Man.
There are currently over 7.5m images from over 14,400 individuals and you can help contribute to the project by visiting https://www.geograph.org.uk

Image: © Des Blenkinsopp Taken: 19 Jan 2020
Looking very much like a medieval antiquity of some sort, there is no information as to whether this earthwork is actually very old. The park doesn't seem to have a name either.