Hrútagjárdyngja is a 6,000 to 6,500 years old ava shield, plus a lava flow that covers 80-100 sq. km of land. That volume of lava is at least 3 cu. km. Besides a large top carter, the upper part is cut by deep ravines, probably due to magma injections, causing the whole structure to inflate.
Location: Sign can be found from road 42 that leads to the shield.