As the undisputed 'colossus' of islands, Greenland spans approximately 2.16 million square kilometers, making it more than 2.5 times larger than the runner-up, New Guinea. An intriguing fact: although it is classified as an island, 80% of its surface is shrouded in a massive ice sheet. If that ice were to melt entirely, the bedrock would rebound from the reduced pressure, potentially fragmenting the landmass into an archipelago. Compared to others on this list, Greenland boasts an extraordinarily low population density, with roughly 0.03 people per square kilometer, embodying the essence of extreme wilderness.