The fortification of Fort Alcatraz began in 1853. It is all a matter of history, if anyone wanted to dig it up. Apparently, the radar detection of underground structures (not unusual for a coastal fort) occurred in 2019. Similar coastal forts can be found in
Washington state.
The fortification of Fort Alcatraz began in 1853. It is all a matter of history, if anyone wanted to dig it up. Apparently, the radar detection of underground structures (not unusual for a coastal fort) occurred in 2019. Similar coastal forts can be found in Washington state.