27 Jun '11, 7am

10 Most Incredible Natural Arches On Earth (rt @imadnaffa) #Geography

10 Most Incredible Natural Arches On Earth (rt @imadnaffa) #Geography

The longest of the numerous natural arches in Utah’s Arches National Park – indeed the longest true arch on earth – Landscape Arch is a phenomenal 290 feet in length. Just as phenomenal is the fact that at its thinnest point this slender arc of rock is only 6 feet thick. Since 1991, three large slabs of sandstone measuring 30, 47 and 70 feet long have fallen from Landscape Arch's narrowest section, prompting the Park Service to close the trail that led beneath it. It could collapse at any time.

Full article: http://www.environmentalgraffiti.com/featured/most-incred...

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