Norðurflug Geothermal Helicopter Tour flight landing at the Geothermal area at Hengill. Posted on December 20, 2020December 20, 2020 × Norðurflug Geothermal Helicopter Tour flight landing at the Geothermal area at Hengill. Norðurflug Geothermal Helicopter Tour flight landing at the Geothermal area at Hengill.