Correction for the size of Alcatraz
Thanks for your input! Let us know more about what's wrong in the form below.
How big is 20,000 squares?
It's about two times as big as Alcatraz
The size of Alcatraz is about 9,600 squares.
(a.k.a. The Rock) (California)
Alcatraz Island measures 9,600 squares. It is known a part of the Golden Gate National Recreation Area, and has historically served as a lighthouse, fort, military prison, and — most famously — a federal prison.