Antarctica

The five largest islands or peninsulas in which the crests of the World Ridges break through the uniform covering of the hydrosphere are termed continents, and designated by the names Eurasia, Africa, North America, South America, and Australia. They are distinguished from other islands and peninsulas by size alone, Australia being ten times larger than New Guinea, and Africa ten times larger than Arabia, these being the greatest island and peninsula not called continents. The elevated region round the South Pole is crowned by the unexplored and scarcely discovered continent of Antarctica.

1891, Hugh Robert Mill, “THE CONTINENTAL AREA”, in The Realm of Nature: An Outline of Physiography, London: John Murray, published 1892, →OCLC, page 274

Dr. Murray believes that Alexander I. Land is a part of the west coast of Graham's Land, and that this landmass, which Biscoe and Larsen proved to widen rapidly toward the south, is only a peninsula of the continent of Antarctica.

1894 August, Cyrus C. Adams, “Antarctic Exploration”, in The American Naturalist, volume XXVIII, number 332, sourced from New York Sun, →ISSN, →OCLC, page 696

The project poses exceptional challenges, given that Antarctica is the coldest, windiest and driest continent on Earth, as well as the most remote and inaccessible, being almost totally covered by a vast ice sheet.

2019 September 26, Gianluca Mezzofiore, “Wanted: A design team for a building project at Earth’s most remote location – Antarctica”, in CNN