Most of the volcanoes in the Timanfaya National Park are extinct or dormant. However, Fire Mountain, as you will see in the visitor demonstrations of the tour, is classed as active. This means that just meters below the surface the magma chambers produce heat of up to 600 degrees Celsius. The geyser and fire demonstrations are a great way to witness the intense heat and you'll even find that the El Diablo restaurant even cooks food using the heat of the volcano.