The causeway to Worms Head, Rhossili, Gower. The Gower Peninsular was the first designated Area of Outstanding Natural Beauty in the UK and covers 188 km². The causeway may be crossed some 2.5 hours each side of low water. Check with the National Coastwatch Institution lookout on the mainland before making the crossing. On Worms Head are the remains of a promontory fort, a prehistoric or early historic enclosure the date of which is uncertain. On the north edge of the causeway near the mainland is an anchor from The Samuel, carrying 500 tons of coal from Swansea, it went ashore on rocks in November 1884. The Rhossili LSA rescued the ship’s crew. Grey seals may often be seen swimming around Worms Head. Worms Head takes its name from the old English 'wurm or wyrm' meaning dragon - so dragons head.