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America's 11 most endangered places

Published On: Jun 06 2012 10:30:22 AM CDT   Updated On: Jun 19 2013 12:32:24 PM CDT

From the Astrodome to America's first permanent English settlement, check out these national treasures before they disappear.

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Martha’s Vineyard Museum

Gay Head Lighthouse -- One of the first lighthouses built on Martha's Vineyard, the Gay Head Lighthouse is in immediate danger of toppling over the edge of the Gay Head Cliffs in Aquinnah, Mass.

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