Grand central is not that far from the Empire State Building. You could walk it with no problem.
take the Shuttle or 7 train from Grand Central to Times Square and transfer to the 1 train uptown to 59th Street/Columbus Circle
Train station. Subway is under ground and train station is overground.
no it's an underground train system
Lots of them, both above and below ground. See related link.
Either exit the subway and walk 3 to 4 blocks east to Grand Central (between Park and Lexington Avenues), or, transfer at 42nd Street-Bryant Park to the Uptown 7 train (the purple line), 1 stop, from 42nd Street-Bryant Park to 42nd Street-Grand Central.
The easiest route would be to walk east toward the City Hall stop and take the 6 train (green line) uptown to 42nd St, Grand Central.
Take the Manhattan-bound 7 train (the purple line), 1 stop, from 42nd Street-Grand Central to 42nd Street-Bryant Park. Transfer at Bryant Park to the M.Or, walk 4 blocks west on 42nd Street from Grand Central (at Lexington Avenue) to 6th Avenue, and get on the subway at 42nd Street-Bryant Park.
The only Number 6 train you may be referring to is the MTA Subway number 6. This train line does not go to NYC Penn Station, but does go to Grand Central Station. The best suggestion is to take the MTA "S" train (for Shuttle) that gives you a very fast trip from Penn Station to Grand Central. There you will find the number 6 train.
The train from Baltimore goes into Penn Station. You can catch a shuttle from there to Grand Central.
Cornelius Vanderbilt created the Grand Central Train Station that was built in 1871.
Yes, you can reach LaGuardia Airport (LGA) by train, but it requires a combination of train and bus or subway services. You can take a train to either Penn Station or Grand Central Terminal, and then transfer to a bus (like the Q70 SBS) that goes directly to LGA. Alternatively, you can take the subway to Astoria and then catch a bus to the airport.