Photos

The NY subway is amazing to me. It is a world downstairs and the system is very good crossing all the city (I be shame about Rio de Janeiro`s subway service when compared with the NY one).

General Info
The New York City Subway is a rapid transit system owned by the City of New York in the United States and leased to the New York City Transit Authority. It is the most extensive public transportation system in the world by number of stations, with 468 stations in operation and one of the world's oldest public transit systems.

Subway Lines
There are 24 train services in the subway system, including three short shuttles. Each route has a color and a local or express designation representing the Manhattan trunk line of the particular service. The color lime green is exclusively assigned to the Crosstown Line route since it operates entirely outside Manhattan while the shuttles are all assigned dark slate gray.
The 1, 6, 7, C, G, L, M and R trains are fully local; making all stops.
The 2, 3, 4, 5, , , A, B, D, E, F, N and Q trains have portions of express and local service.
The J train normally operates local, but during rush hours it is joined by the Z train in the peak direction. Both run local, express or skip-stop on different parts of their route.
The letter S is used for three shuttle services.