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| | Top20Pennsylvania.com - Your Top20 Guide to Pennsylvania! |
 | | In 1889 the South Fork Dam, impounding a recreational mountain lake for sportsmen, burst after a heavy rain and destroyed the downstream factory town of Johnstown, killing over 2,200 inhabitants in the notorious Johnstown Flood (the town was later rebuilt and is a reasonably large community today in the central mountains). |
 | | In 1961 an exposed seam of coal at Centralia, Pennsylvania caught fire and forced eventually almost the entire community to abandon their settlement; the coal fire is still burning today and is estimated to last 100 years more. |
 | | Marian Anderson, of Philadelphia, world-reknowned contralto, who, after the Daughters of the American Revolution refused to let her sing at Constitution Hall because she was African-American, was famously invited to sing at the Lincoln Memorial by Eleanor Roosevelt. |
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