Numerous places have been constructed along the Hudson that have since become landmarks. Following the river from its source to mouth, there is the Hudson River Islands State Park in Greene and Columbia counties, and in Dutchess County, there is Bard College, Staatsburgh, the Vanderbilt Mansion National Historic Site, Franklin D. Roosevelt's home and presidential library, and the main campus of the Culinary Institute of America, Marist College, the Walkway over the Hudson, Bannerman's Castle, and Hudson Highlands State Park. South of that in Orange County is the United States Military Academy. In Westchester lies Indian Point Energy Center, Croton Point Park, and Sing Sing Correctional Facility. In New Jersey is Stevens Institute of Technology and Liberty State Park. In Manhattan is Fort Tryon Park with the Cloisters, and the World Trade Center. Ellis Island, partially belonging to both the states of New Jersey and New York, is located just south of the river's mouth in New York Harbor. The Statue of Liberty, located on Liberty Island, is located a bit further south of there. Landmark status and protection A stretch on the east bank of the Hudson has been designated the Hudson River Historic District, a National Historic Landmark. The Palisades Interstate Park Commission protects the Palisades on the west bank of the river. The Hudson River was designated as an American Heritage River in 1997. The Hudson River estuary system is part of the National Estuarine Research Reserve System as the Hudson River National Estuarine Research Reserve. Transportation and crossings The Hudson River is navigable by large steamers up to Troy, and by ocean-faring vessels to the Port of Albany. The original Erie Canal, opened in 1825 to connect the Hudson with Lake Erie, emptied into the Hudson at the Albany Basin, just south of the Federal Dam in Troy (at mile 134). The canal enabled shipping between cities on the Great Lakes and Europe via the Atlantic Ocean. The New York State Canal System, the successor to the Erie Canal, runs into the Hudson River north of Troy. It also uses the Federal Dam as a lock. Along the east side of the river runs the Metro-North Railroad's Hudson Line, from Manhattan to Poughkeepsie. The tracks continue north of Poughkeepsie as Amtrak trains run further north to Albany. On the west side of the river, CSX Transportation operates a freight rail line between North Bergen Yard in