Under the guidance and fund-raising expertise of the National Parks of New York Harbor Conservancy -LRB- nyharborparks.org -RRB- and the oversight of NYC & Company -LRB- the city 's tourism bureau -RRB- , Federal Hall would become the Park Service 's New York center , a place where the 10 national parks in the New York-New Jersey area -LRB- with their 23 historic sites -RRB- would be united in the cause of harbor tourism .