US Civil War-era tunnels and buildings found under Alcatraz prison
Civil War-era fortifications have been discovered just below the prison's recreation yard, a study shows.
from BBC News - World https://ift.tt/2VIjmei
from BBC News - World https://ift.tt/2VIjmei
US Civil War-era tunnels and buildings found under Alcatraz prison
![US Civil War-era tunnels and buildings found under Alcatraz prison]()
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March 07, 2019
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