Ibyuk Pingo

Erupting from the pancake-flat tundra just outside the community of Tuktoyaktuk, this bulbous, ice-filled mound is the second-largest "pingo" on Earth. Called Ibyuk, it's 1,000 feet wide at its base and rises to the height of a 15-storey building, making its summit a scenic and popular destination for hikers.

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