North Stack North Stack North Stack (Welsh: Ynys Arw, meaning "rugged island") is a small island situated just off Holy Island on the north-west coast of Anglesey. North Stack can also refer to the headland opposite the island. This is the site of a redundant fog warning station, comprising a number of buildings, including the Trinity House Magazine, built in 1861, where shells for the warning cannon were stored. These buildings now house a bird watching observatory, giving a view of South Stack lighthouse across Gogarth Bay, and the studio of artist Philippa Jacobs. The Precambrian quartzite cliffs of this headland, including
Geography of Wales Geography of Wales Wales () is a country that is part of the United Kingdom and is part of the island of Great Britain and offshore islands. It is bordered by England to its east, the Irish Sea to its north and west, and the Bristol Channel to its south. It has a total area of and is about from north to south and at least wide. It has a number of offshore islands, by far the largest of which is Anglesey. The mainland coastline, including Anglesey, is about in length. As of 2014, Wales had a population of about