Lower Manhattan, View From Castle Clinton In Battery Park, New York Royalty-Free Stock Photography

Lower Manhattan, View from Castle Clinton National Monument in Battery Park, lower Manhattan, New York. Of all the United States military forts, none have had a more colorful life than that of Castle Clinton. It began as the Southwest Battery, a small, D-shaped fort built between 1808 and 1811 to protect New York City, then later became an opera house, an immigration station, and an aquarium.