Both East Harlem (which is also called, "Spanish Harlem") and West Harlem (which is normally called just plain, "Harlem") are in Manhattan.

No, East Harlem is a neighborhood in Upper Manhattan.

No, Harlem is a neighborhood in the borough of Manhattan, in New York City. Actually, it is technically two neighborhoods, West Harlem and East Harlem. East Harlem is also called Spanish Harlem, because it is home to a very large Latino community. West Harlem, on the other hand, is primarily (and historically) a black neighborhood, although in recent years it has seen a big increase in its white population.

The neighborhoods do not have precise boundaries, so everybody has a different opinion as to exactly where Harlem begins and ends. Generally speaking, however, West Harlem runs south to north from West 110th Street to West 145th Street, and west to east from the Hudson River to Park Avenue. East Harlem, or Spanish Harlem, runs south to north from East 96th Street to East 145th Street, and west to east from Park Avenue to the East River. 125th Street, which is a two-laned street that runs west/east and east/west from the Hudson River to the East River and back, is considered the heart of Harlem.

Harlem is not a country or a state, so, it does not have a capital. Harlem is a neighborhood in New York City. Actually, it is technically two neighborhoods: West Harlem and East Harlem. East Harlem, also called Spanish Harlem, is a predominantly Latino neighborhood, while West Harlem is predominantly -- and historically -- a black neighborhood (although in recent years it has seen a big increase in its white population).

The heart of Harlem is 125th Street, which is a two-way street that runs east-west and west-east across Upper Manhattan.

Park Avenue and East 106th Street is in the heart of the neighborhood known as East Harlem, aka Spanish Harlem, in Upper Manhattan. East Harlem/Spanish Harlem is the neighborhood directly above the Upper East Side.