The moat
Beaumaris castle faces Garth Celyn on the opposite shore of the narrow Menai Strait and was constructed here, together with Conwy castle and Caernarfon castle at either end of the Menai Strait, to control the shipping traffic in the area. It is an easily defendable site, but by the time the castle was nearing completion, funds were cut off and the project was never completed. Nevertheless, it is still seen as the most sophisticated and architecturally symetrical castles ever built.