Group says Landscape Arch in Arches NP, Not Kolob Arch in Zion NP, is World's Largest Span of Stone
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If you stood beneath both Landscape Arch in Arches National Park and Kolob Arch in Zion National Park, could you tell which span is longer? Probably not, but a group has come up with a standardized way to measure arches and says Landscape is the longer span of stone.