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
Woody Island Lighthouses important in demonstrating the evolution or pattern of Queensland's history. Constructed in 1866, while not forming part of the major lighthouses constructed along the Queensland coast from the late 1860s to 1890, the Woody Island Lighthouses are significant in demonstrating Queensland's history, occupying an integral part in understanding the establishment of maritime navigational aids along the Queensland coast, and reflects the growth and development of Queensland after its separation from New South Wales. The site survives as an important illustration of the early industrial development of Queensland, and of the settlement of the Maryborough/Hervey Bay in particular, and the geographical