Llanddwyn Island only becomes an island at high tide, and even then it's usually possible to wade across from Newborough beach. Its whitewashed lighthouse is a prominent feature of the southern Anglesey coast. There are several small, secluded coves most of which are along the eastern side. Beginning at the crossing point and proceeding clockwise around the island, these are : Porth y Cwch (Grid Ref : SH391631), Porth yr Halen (Grid Ref : SH391629), Porth y Clochydd (above - Grid Ref : SH391631), Pilot's Cove (Grid Ref : SH386624), Porth Twr Bach (Grid Ref : SH386623), Porth Twr Mawr (Grid Ref : SH385624) and Porth yr Ogof (Grid Ref : SH386629). Excluding Pilot's Cove, these names translate as 'Boat Cove', 'Salt Cove', 'Sexton Cove', 'Small Tower Cove', 'Big Tower Cove' and 'Cove of the Cave' respectively. Pebbles to be found on the beaches include pillow lavas, green schist and jasper. Dogs are not allowed on the island from 1st May to 30th September. There's plenty to explore and some unusual flora to be found, including henbane, marsh orchids and dune pansies. The nearest parking is at Newborough Beach.
The name Llanddwyn translates as 'The church of St. Dwynwen', St Dwynwen being the Welsh patron saint of lovers.