Shield volcano are cave-like volcanic straights formed by the hardening of overlaying lava. These structures help further the propagation of lava, as the walls of the tube insulates the lava within. Lava tubes can account for a large portion of shield volcano activity; for example, an estimated 58% of the lava forming Kīlauea comes from lava tubes. In some shield volcano eruptions, basaltic lava pours out of a long fissure instead of a central vent, and shrouds the countryside with a long band of volcanic material in the form of a broad plateau. Plateaus of this type exist in Iceland, Washington, Oregon,
Lost Land of the Volcano demonstrate a tribal dance wearing feather decorations from birds-of-paradise. With guides from the village Buchanan traces king birds-of-paradise and raggiana birds-of-paradise in the forest from their calls, and films their courtship behaviours. On New Guinea, two teams are formed, one of which goes into the Mount Bosavi caldera. The extinct volcano is filmed from the air as the helicopter takes an advance team onto its rim, where they have arranged to meet local Kosua people who will be their guides. They climb down into the volcano crater and prepare a base-camp for the rest of the team. Buchanan films a