Correction for the size of Alcatraz
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How big is 388,000,000 square meters?
It's about 4,500 times as big as Alcatraz
The size of Alcatraz is about 89,000 square meters.
(a.k.a. The Rock) (California)
Alcatraz Island measures 89,000 square meters. 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.