We are currently asking our readers to help us compile a virtual atlas of imaginary islands. This may seem a novel idea, but people have actually been inventing islands for centuries. Explorers in the 1800s seem to have been particularly fond of such activity, especially well-financed types drawn to the icy reaches of the far north. By the turn of the century some 200 islands that did not exist were present on charts and atlases.
One of these is Crocker Land, first reported in 1906 by the American explorer Robert E. Peary after a failed attempt to reach the North Pole. The island was the subject of another expedition by Donald MacMillan in 1913, but Crocker never revealed itself.
What did emerge, however, is footage of MacMillan and his team at work. You can see some of what they got up to in the video below.
For more on fake islands, have a look at this fascinating article on Atlas Obscura.