5 to 36 m (16 to 118 ft), in various stages of growth and collapse. Ibyuk Pingo, the highest, continues to grow about 2 cm (0.79 in) per year, and is estimated to be at least 1,000 years old. Unique to areas of permafrost, pingos have formed here thanks to numerous lakes in the Tuktoyaktuk Peninsula.
Pingo National Landmark is a natural area protecting eight pingos near Tuktoyaktuk. It is in a coastal region of the Arctic Ocean which contains approximately 1,350 Arctic ice dome hills—approximately one quarter of the world's pingos. In a region near the Beaufort Sea which is quite flat, pingos dominate the skyline, rising from