A well preserved ancient stone circle forms part of the boundary of the cricket pitch.
Where are we?
Here's an extract from 'The Dolgellau Town Trail' page on one of Dolgellau's many on-line information sources:
"The Marian, Dolgellau's main green space and one of its greatest assets, was given in trust to the town in 1811. It has been the focus of the town's leisure activities for generations. By the 16th century there was a bowling green surrounded by ditches to keep out grazing animals. It lay under the car park. A hollow in the grass in the cricket outfield marks the site of a cockpit. The stone circle was set up in 1948 to proclaim the National Eisteddfod of Wales the following year. Using stone-age technology for advertising in this way is a peculiarly Welsh phenomenon."
So it's not ancient at all!