CONCEPTS INCLUDE: Headwaters, Estuary, Brackish, Tappan Zee, Drowned River, Palisades, Ice Age, Tributary, Confluence, Ancient Indian Cultures, Steamboats, and Revolutionary War. FAMOUS PEOPLE / EXPLORERS INCLUDE: Henry Hudson, George Washington, Thomas Jefferson, Peter Minuit, Giovanni da Verrazano, and Robert Fulton. CITIES /PLACES INCLUDE: New York Harbor, Erie Canal, Statue of Liberty, Albany, N.Y., New York City, Ellis Island, West Point, New Amsterdam & New Netherland.