Tusker Rock
Tusker Rock (Welsh: Ynys Twsgr), is a rock in the Bristol Channel, situated about 2 miles west of Ogmore-by-Sea, Bridgend, Wales. It takes its name from Tuska the Viking, a Dane whose fellow Vikings semi-colonised the Vale of Glamorgan.
It is fully visible only at low tide, and was formerly a notorious hazard for ships.