NYC’S COMPLEX CONNECTIONS
New York City’s subway system has 32 station complexes (i.e. sets of two or more stations connected with a passageway inside fare control)- 2 in the Bronx, 2 in Queens, 10 in Brooklyn and 18 in Manhattan.
Out of the 32 stations, 16 are fully accessible, 7 are partially accessible, and 9 are not accessible at all.
Below is a distorted map of how they are all connected in 3D.
For a more detailed view of each of the individual stations, see here.
This is where they are in the actual subway map:
And here are some zoomed-in views :
Lower Manhattan
Civic Center / Chinatown / Noho / Lower East Side
14th Street
Midtown West / Midtown
Midtown East / Upper East Side
Concourse / Mott Haven
Long Island City / Elmhurst / Jackson Heights
Downtown Brooklyn
Cypress Hills / Bed Stuy / Bushwick