Peter Sinks is a natural sinkhole in northern Utah that is one of the coldest places in the contiguous United States.
Peter Sinks is located 8,100 feet above sea level, in the Bear River Mountains east of Logan, within the Wasatch-Cache National Forest. Due to temperature inversions that trap cold nighttime air, it routinely produces the coldest temperatures in the contiguous United States. Even in the summer, the bottom of the sinkhole rarely goes four consecutive days without freezing. It is so cold near the bottom of the hole that trees are unable to grow.
Source: Wikipedia.org
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