Hasselwood Rock

Hasselwood Rock is a one meter high, uninhabitable skerry about 200 meters north of Rockall in the northeast Atlantic Ocean, within the exclusive economic zone of the United Kingdom, measuring roughly 13 meters across and often submerged or hidden by breaking waves at high tide or in heavy seas. Its upper part is the destroyed cone of an extinct volcano, though its full geological composition remains unknown. The rock is the site where the steamship Norge ran aground in 1904, a wreck that killed more than 635 people and remains the worst maritime disaster involving a Danish merchant ship.