We often think of the NYC subway as a relatively modern marvel, a system that has expanded and evolved tremendously over 100-plus years, and a shell of what it was when it first debuted in 1904. However, the reality is that the majority of the lines that make up today’s network were actually built before The Great Depression. In fact, as graphic designer Jake Berman’s insightful throwback map depicts, it was pretty much all systems go by 1939.

See the full map and read more at 6sqft...