Hidden Military Facility Is Uncovered Buried Under Infamous Prison, Alcatraz

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Alcatraz Penitentiary is one of the most storied prisons in American history. Built-in the middle of the San Francisco Bay, the now-defunct institution is home to prison tours during the day and ghost hunting tours during the night.

an escape hole at alcatraz penitentiary

And now, thanks to a group of archaeologists from Binghamton University, another mystery has been revealed. Using laser technology the team was able to explore the ground beneath the prison exercise yard, and what they found might just change the way we look at Alcatraz forever.