English: This is a magma chamber inside a volcano in Iceland called lava called Thrihnukagigur. An open conduit leads 120 m to the surface and visitors are lowered in a cable car.
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Looking up the volcanic throat of Thrihnukagigur in Iceland, an open volcanic conduit, from the former magma chamber. A lift use to move people up and down the 120-meter drop is visible in the image.