NABSQNO 15S-658760-4138150![]() Turner Natural Bridge, Shannon County, Missouri Photo by John Burns NABSQNO 15S-658760-4138150. Turner Natural Bridge is a cave natural arch eroded through Gasconade dolomite. It is located about 6 miles south of Bunker, Missouri. Turner Natural Bridge appears in the second edition of the Beveridge catalog as number 260, with a reported span of 50 feet.
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