The Lost Forty, located in Minnesota, is the largest surviving patch of old-growth forest in the state. The 144-acre land, officially known as theLost Forty Scientific and Natural Area, contains pine trees that are between 300 to 400 years old, which is close to the trees’ maximum natural life span of 500 years.
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The forest managed to avoid deforestation thanks to a surveying error in 1882. It turns out that the three-man survey team sent to chart the area between Moose and Coddington Lakes stretched the Coddington Lake half a mile further northwest than it actually exists. This mistake, which was embedded into maps until the 1960s caused the forest to be overlooked. Learn more about the forest here!
Image credit: Minnesota Department of Natural Resources