Helen's Reef
United Kingdom
Helen's Reef is a series of skerries in the North Atlantic, two kilometres (one nautical mile) northeast of the larger islet of Rockall and outcrop of Hasselwood Rock, within the United Kingdom's exclusive economic zone. The skerries are covered at high tide or in rough seas, and are often only visible as breaking waves. Its highest elevation is lower than 6 feet under sea level. It is within the 12-nautical-mile-radius (22-kilometre) territorial waters of Rockall, which is claimed by the UK as of 1955 and incorporated into the UK by the Island of Rockall Act 1972. This claim was previously long disputed by Ireland, but the dispute is resolved as of 31 March 2014.
Data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).