Correction for the size of Alcatraz
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How big is 324,219 hectares?
It's about 35,000 times as big as Alcatraz
The size of Alcatraz is about 8.90 hectares.
(a.k.a. The Rock) (California)
Alcatraz Island measures 8.90 hectares. 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.