Greenland is the world's largest island and most of its landmass sits north of the Arctic Circle. For eco-tourists, Greenland is considered one of the last frontiers because of its lack of transportation infrastructure and its sparse population (less than 60,000 people live in an area of more than 800,000 square miles). More than three-quarters of Greenland is covered by ice, making it possible for people who want an Arctic experience to find plenty of places to explore. The most attractive aspect of Greenland is its wilderness. Apart from population centers along the southern coastline, getting around requires a bush-plane flight, snow-machine ride or even a trek on skis or a dog sled. Kayaking, glacier walking and mountain climbing are on the agenda for adventure seekers, while nature lovers will see polar bears and caribou on land, seals and walruses on shore and whales in the coastal waters around Greenland.