Why can't I build a city here?

Why can't I build a city here? - Handsome young ethnic guy in white t shirt holding skateboard in hand and looking away thoughtfully while resting near modern building after ride

I cannot build a city with my settler in all the red area and I don't get why.

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Pictures about "Why can't I build a city here?"

Why can't I build a city here? - Black and white of young tattooed ethnic males of band in accessories and casual apparel in town
Why can't I build a city here? -
Why can't I build a city here? - Green Tree Beside Brown and White Concrete Structure





Liz Phair - Why Can't I? (Official Video)




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Images: Monstera, Khoa Võ, Julian Bracero, Bruno Cervera