Walking through Union Square on my way to visit Brooklyn via the Brooklyn Bridge, I saw a small group of people with a sign saying 'New York Historical Society Public Programs". I had a conversation with them, and joined their lecture about the statues to Lafayette and Washington in the park. The lecture was delivered by Cal Snyder, who's written a book about New York's war memorials. His lecture was a great way of deepening my understaning of American history.
I never made it to Brooklyn.
You can read about Lafayette on wikipedia.