Freedom Trail
On top of Faneuil Hall, there is a famous weathervane (which tells which way the wind is blowing).  It is shaped like a golden grasshopper.  Legend says that Bostonians used this weathervane during the War of 1812 to find spies.  If a person did not know the answer to the question "What is on top of Faneuil Hall?", they were suspected of being a spy.