American sailor Benjamin Morrell erroneously reported the existence of New South Greenland, a phantom island, near Antarctica.

Benjamin Morrell was an American sea captain, explorer and trader who made a number of voyages, mainly to the Atlantic, the Southern Ocean and the Pacific Islands. In a ghost-written memoir, A Narrative of Four Voyages, which describes his sea-going life between 1823 and 1832, Morrell included numerous claims of discovery and achievement, many of which have been disputed by geographers and historians, and in some cases have been proven false. He ended his career as a fugitive, having wrecked his ship and misappropriated parts of the salvaged cargo.

New South Greenland, sometimes known as Morrell's Land, was an appearance of land recorded by the American captain Benjamin Morrell of the schooner Wasp in March 1823, during a sealing and exploration voyage in the Weddell Sea area of Antarctica. Morrell provided precise coordinates and a description of a coastline which he claimed to have sailed along for more than 300 miles (500 km). Because the Weddell Sea area was so little visited and hard to navigate due to ice conditions, the alleged land was never properly investigated before its existence was emphatically disproven during Antarctic expeditions in the early 20th century.

A phantom island is a purported island which was included on maps for a period of time, but was later found not to exist. They usually originate from the reports of early sailors exploring new regions, and are commonly the result of navigational errors, mistaken observations, unverified misinformation, or deliberate fabrication. Some have remained on maps for centuries before being "un-discovered".