Why is this area apparently unpopulated in the great Buenos Aires, what is it? I'm not sure if I can ask this question here but it is the only Stack Exchange community where I saw the tag Geography. I was reading about the great Buenos Aires and I saw this night satellital picture. There is this big area apparently unpopulated or with little population surrounded by the metropolis. What is it? Why is it apparently unpopulated?
“Campo de Mayo is a military base located in Greater Buenos Aires, Argentina, 30 km (19 mi) northwest of Buenos Aires”. 
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