 Boston Fire Department's Engine Company 54 station house is located on the island, adjacent to the campus.Historical buildings and cemeteries dating from the Civil War to the Cold War can be found on the island, along with a large checkered red and white pattern water tower used as a navigational aid by the FAA for navigation into Logan International Airport.There is also a working organic farm which is large and harvests approximately 25,000 pounds of produce which is used by the kitchens of the homeless shelters, and sold at farmers markets, and used by restaurants in Boston.