Series of buildings and tunnels found under Alcatraz Federal Penitentiary

Series of buildings and tunnels found under Alcatraz Federal Penitentiary

By Vijay Narayan
07/03/2019
Alcatraz Federal Penitentiary

Archaeologists have confirmed a long‑time suspicion of historians and say that famed Alcatraz prison in San Francisco, US, was built over a Civil War‑era military fortification.

SFGate reports researchers have found a series of buildings and tunnels under the prison yard of Alcatraz Federal Penitentiary, which once held Al Capone.

A study published in Near Surface Geophysics says archaeologists used ground‑ penetrating radar and terrestrial laser scans and historical maps and photographs.

Historians believe workers built over existing structures when the prison was built in the 20th century.

Alcatraz first came to the attention of the US government after it wrestled control of California from Mexico in the 1840s.

Its location in San Francisco Bay made it attractive for military fortification purposes.

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