This large island (the world's largest depending on how the seven continents are defined) sits mostly within the Arctic Circle. It is a stark land of glaciers, ice shelves and mountains. Greenland, largely autonomous but officially overseen by Denmark, has one of the lowest population densities in the world. Unique creatures inhabit the beaches, mountains and waters around this ice-laden land. These cold-weather creatures include walrus, whales, seals, polar bears, reindeer and wild oxen. With few roads and a modest infrastructure, nature still rules all around Greenland. Tourists get around by dog sled, kayak or, most often, by bush plane. The sheer wildness of this little-visited land makes it a challenging place to travel, but a rewarding option for those who are seeking out utterly unspoiled nature.