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
Mocha Island Mocha Island Mocha () is a small Chilean island located west of the coast of Arauco Province in the Pacific Ocean. The island is approximately in area, with a small chain of mountains running roughly in north-south direction. In Mapuche mythology, the souls of dead people travel west to visit this island. The island today is home to the Mocha Island National Reserve, a nature reserve that covers approximately 45% of the island's surface. The island is noted as the location of numerous historic shipwrecks. The waters off the island are a popular place for recreational sea fishing. Geologically the