Photo: Flight 93 Memorial
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Flight 93 Memorial ...
The Flight 93 National Memorial is built on an old coal strip mine. The gold colored pools along Approach Road in the National Memorial are Acid Mine Discharge, a highly acidic chemical caused by pyrite rock exposed to rain water as part of the former coal mining process.
https://www.arcc.osmre.gov/programs/tdt/flight93.shtm
Taken on Saturday October 6, 2018 at Flight 93 National Memorial.
More about Flight 93 National Memorial...
The Flight 93 National Memorial is located at the site of the crash of United Airlines Flight 93, which was hijacked in the September 11 attacks, in Stonycreek Township, Somerset County, Pennsylvania.
https://en.wikipedia.org/wiki/Flight_93_National_Memorial
https://www.nps.gov/flni/index.htm
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