The Port of Boston is a major seaport located in Boston Harbor and adjacent to the City of Boston. It is the largest port in Massachusetts as well as being one of the principal ports on the east coast of the United States. The Port of Boston was historically important for the growth of the City of Boston, and was originally located in what is now the downtown area of the city. Land reclamation and conversion to other uses means that downtown area no longer handles commercial traffic, although there is still considerable ferry and leisure usage of the downtown waterfront. Today the principal cargo handling facilities are located in the Boston neighborhoods of Charlestown, East Boston, and South Boston, and in the neighboring city of Everett. The Port of Boston has also been an entry point for many immigrants.