The Ellis Island immigration center processes 11

Ellis Island is an island in New York Harbor, within the U.S. states of New Jersey and New York. Owned by the U.S. government, Ellis Island was once the busiest immigrant inspection and processing station in the United States. From 1892 to 1954, about 12 million immigrants arriving at the Port of New York and New Jersey were processed there; according to one estimate, two-fifths of Americans may be descended from these immigrants. It has been part of the Statue of Liberty National Monument since 1965 and is accessible to the public only by ferry. The north side of the island is a national museum of immigration, while the south side of the island, including the Ellis Island Immigrant Hospital, is open to the public through guided tours.