The sod houses of northern Iceland are part of an isolated and increasingly lonely world in which population is decreasing. The northernmost part of the country grazes the Arctic Circle. Because few roads extend into this region, some villages can only be reached by sea or by air. Farmers and fishers who can no longer make a living are moving away, leaving some villages deserted. The westernmost part of this island country is a peninsula linked to the rest of Iceland by an isthmus only 12 km (7 mi) wide at its most narrow point. It features Iceland's most spectacular fjords.