"Urban Legisode: Eastern State Penitentiary" explains Eastern State Penitentiary, a reform idea that is now best known in Philadelphia for being a great landmark for telling your friends how to find the local restaurants and for the annual Halloween Terror Behind the Walls. (There also used to be a Bastille Day party that involved throwing Tastykakes at onlookers but that's at least temporarily gone.)
Note the "Other" category. There's a lot of things in there that tend to be more visible in an average day. Retired general Stanley McChrystal talks about this in a New York Times Op-Ed, "Save PBS. It Makes Us Safer."
After you see "Hidden Figures" (or read the book) check out Tom Wolfe's story of the same events, sans mathematicians. It's interesting to see the same events from a different perspective; what's left out can be infuriating, but that's what's instructive. And fair dues to Wolfe, his book is a great read and he doesn't contradict the other version so much as leave it out -- possibly was unaware of it? -- concentrating on the story from the perspective of the astronauts, which is what makes the combination of these two versions a compelling, rounded history of this time and place.