The mission of the Harbor Defense Museum of New York City is to collect, preserve, exhibit, and interpret historically significant material related to the history of Fort Hamilton and the seacoast defense in New York. Take a trip and discover an important treasure of New York City's military past. Come explore exhibits on the Battle of Brooklyn, coastal defense, and see firsthand old Fort Hamilton. The museum welcomes tour groups of all kinds. The material is appropriate for 4th grade and older students. The museum offers training opportunities to installation units. Group tours are limited to no more than 60 individuals, and require reservations, please call (718) 630-4349.