Make your way to Grand Central Station or the Metro North station in Harlem and purchase a ticket on Metro North to Tarrytown on the Hudson Line. You can buy passes online or at the kiosks in person, or while you are on board. The ride is approximately 30 minutes into the Tarrytown station.
Tarrytown is located in Westchester County, just 26 miles north of New York City. It is easily accessible by car via the Henry Hudson Parkway North (Route 9A North) right into the city center, or by train from Grand Central Station.