It's easy to spot this 46-gun wood warship, as it's fronted by a figurehead of a white unicorn. This frigate has the distinction of being the oldest British-built warship afloat, having been launched in 1824 at Chatham, England. You can clamber right down into the hold, or see the models and displays about the Royal Navy's history. In the summer there are often jazz nights onboard. The ship's hours vary in winter, so call ahead.