Iceland, a Nordic island nation, is defined by its dramatic volcanic landscape of geysers, hot springs, waterfalls, glaciers and black-sand beaches. The capital, Reykjavik, home to the majority of the population, runs on geothermal power and offers a renowned nightlife scene as well as Viking history museums. The glaciers in Vatnajokull and Snæfellsnes national parks are popular for ice climbing, hiking and snowmobiling. Icelandic culture is founded upon the nations Scandinavian heritage. Most Icelanders are descendants of Germanic and Gaelic (Celtic) settlers. Icelandic, a North Germanic language, is descended from Old Norse and is closely related to Faroese and West Norwegian dialects. The countrys cultural heritage includes traditional Icelandic cuisine, Icelandic literature and medieval sagas. Iceland has the smallest population of any NATO member and is the only one with no standing army, its lightly armed coast guard being in charge of defense.