  thumb|right|250px|map showing the original route of the harlem river, and the current path.  marble hill is the neighborhood which makes up the northernmost part of the borough of manhattan in new york city, united states. although it is politically part of manhattan and new york county, because of the construction of the harlem ship canal in 1895, it became an island in the harlem river. in 1914, the harlem river was filled in on the north side of the new island of marble hill, connecting marble hill to the north american mainland contiguous with the bronx.tax block & tax lot base map files on cd-rom, new york city department of city planning. accessed july 26, 2007. "marble hill is a neighborhood that is part of the borough of manhattan but is administratively often included with neighb
Border_irregularities_of_the_United_States Neighborhoods_in_Manhattan U.S._Route_9