Anglesey () was designated an AONB in 1966, in order to protect the aesthetic appeal and variety of the island's coastal landscape and habitats from inappropriate development. The AONB covers most of Anglesey's coastline, as well as inland areas, such as Holyhead Mountain and Mynydd Bodafon. The AONB covers around , about a third of the county, making it Wales' largest AONB.