USS Constitution
The world's oldest commissioned warship still afloat, docked in Boston Harbor.
USS Constitution is a 227-year-old wooden-hulled frigate that fought in the War of 1812, earned the nickname 'Old Ironsides' after cannon fire seemed to bounce off her sides, and has never been formally decommissioned from the United States Navy. She is the oldest warship anywhere in the world that is still afloat, and she remains an active vessel — crewed by active-duty Navy sailors who serve as your guides. That detail alone makes this unlike any other historic ship you'll visit.
You board the ship at the Charlestown Navy Yard, where she has been berthed since 1897. The sailors walk you through the gun deck, the captain's quarters, the berth deck where the crew slept in hammocks, and the hold, explaining life aboard a fighting ship in the early 1800s with a level of enthusiasm and knowledge that puts most museum docents to shame. The cannons are massive and the ceilings are low — duck early and often. Adjacent to the ship, the USS Constitution Museum (free admission, donations welcomed) expands the story considerably and is worth an hour on its own.
The Navy Yard itself is part of Boston National Historical Park, and the whole complex sits across the harbor from downtown Boston, making it a natural pairing with the Freedom Trail. Arrive early — the ship can get crowded mid-morning, particularly in summer — and check the schedule on the official website, as the ship occasionally closes for maintenance or special Navy events. Access to certain decks may be limited depending on the day.