1 - Porthmadog to Abersoch
Porthmadog Rock Cannon
A view over the Porthmadog Rock Cannon ,on Ynys Tywyn, to the Afon Glaslyn and Cei Ballast Island .
A rock cannon is a rock or boulder which has been bored with holes which can be partly loaded with black powder (gunpowder)
and ignited to make explosive sounds during traditional celebrations. Some 18+ holes are in this Rock.
They are a common feature in the quarrying districts of North Wales .Over 200 sites have been recorded.
Ref: NW 4574
Date: 20/06/2025
Location: SH 5721 3849
