Holy Island, Anglesey Rhoscolyn, and Four Mile Bridge. Around of the Anglesey Coastal Path is on Holy Island. Peripheral islands and stacks include North Stack, and South Stack, with its famous lighthouse. Before – and even after – the construction of lighthouses, the cliffs and jagged rocks of the island were a great danger to sailors. Holy Island, Anglesey Holy Island (, 'the island of (Saint) Cybi') is an island () on the western side of the larger Isle of Anglesey, Wales, from which it is separated by a narrow, winding channel. It is called "Holy" because of the high concentration of standing
North Wales defined as the region east of the River Conwy and west of the River Dee; and Ynys Môn (or Anglesey), a large island off the north coast. The division with the rest of Wales is arbitrary and depends on the particular use being made. For example, the boundary of North Wales Police differs from the boundary of the North Wales area of the Natural Resources Wales and the North Wales Regional Transport Consortium ("Taith"). The historic boundary follows the pre-1996 county boundaries of Merionethshire and Denbighshire which in turn closely follows the geographic features of the river Dovey to Aran