Free Admission Wednesday at Federal Hall National Memorial - see INFO below. Birthplace of American Government Here on Wall Street, George Washington took the oath of office as our first President, and this site was home to the first Congress, Supreme Court, and Executive Branch offices. The current structure, a Customs House, later served as part of the US Sub-Treasury. Now, the building serves as a museum and memorial to our first President and the beginnings of the United States of America. Federal Hall NM Open House New York 2018 Open House New York Weekend unlocks the doors to New Yorks most important buildings A Junior Ranger receives her badge. Be a Junior Ranger Young people who would like to participate in Federal Hall's Junior Ranger Program can start right here. Visitors can now download three free apps to help you visit 23 national park sites around NYC. Download Three Free Apps Visitors can now download three free apps to help you visit 23 national park sites around NYC. Free downloads for iPhone and Android! More Info below.