Glacial Landforms
Introduction
The photograph on this page of Glacial Landforms by Anne Burgess 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: © Anne Burgess Taken: 27 Feb 2015
The hollow is almost certainly a relic of the glaciers of the last Ice Age, carved by melting water.