Ynys Faelog is a small tidal island in the Menai Strait between Gwynedd and the Isle of Anglesey, Wales, near the town of Menai Bridge.[1][2] On average it measures 140 metres by 130 metres and is connected by a narrow stone causeway to the Anglesey mainland.[3] There is a two-storey house on the island with three outbuildings and a boathouse.