Greenport, a village in Southold midway between Orient and Riverhead, is a major economic center for the North Fork and as such, is the eastern terminus of the Long Island Rail Road's Main Line. The North Fork is also geographically tied to a separate township, Shelter Island, an island in the Peconic Bay accessible via ferry that leaves from Greenport, adjacent to the railroad station. The island also has a ferry on its south side that connects with North Haven on the South Fork.