Metro-North Railroad - Hudson line
(http://www.mta.nyc.ny.us/...). This is the last station stop on Hudson Line commuter trains out of New York City. Express service between Poughkeepsie and Grand Central Terminal is about 1 hour and 20 minutes, local service considerably longer. Local service is also available to other Metro-North commuter stations. On-board train fares are subject to a stiff surcharge, so buy your tickets at the vending machines located on the platform. On trains departing from Grand Central Terminal in Manhattan, get a seat on the left side of the train. Opposite Yonkers and Hastings-on-Hudson you will be treated to great views of the sheer cliffs of the Palisades and between Cold Spring and Beacon you will get a glimpse of Bannerman Castle on an island offshore.
