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Underground tunnels connect busy NYC commuters

New Yorkers are always looking for ways to save time and avoid crowds.

In midtown and other busy areas, a network or underground pedestrian passageways connect some busy transit hubs.

An entrance at 48th Street and Park Avenue allows you to travel underground to Grand Central at 42nd Street. It's popular with riders of MetroNorth Railroad.

Minh T. Nguyen created NYC Subway Guide after researching the system, riding it, and watching people try to navigate the city.

He posted a video recently highlighting one of the underground connectors. It allows you to go from St. Patrick's Cathedral on 5th Avenue through Rockefeller Center and two other buildings and eventually end up in Times Square.

Eventually you emerge at 49th Street and 7th Avenue. The passageway is open during business hours.

An new underground trek connects Manhattan's west and east sides from the Hudson River to Fulton Center using the Brookfield Place complex on Vesey Street and North End Avenue.