The Freedom Trail in Historic Boston
Top: Old South Meeting House, Old State House, King's Chapel, State Capitol, Old North Church and Paul Revere Statue.
Centre: Faneuill Hall, Paul Revere's House
Bottom: Old Corner Bookstore, U.S.S Constitution, Old Granary Burying Ground, Park Street Church, Bunker Hill Monument
Of course, from the back of the card :)
apart from the clock postcard there is also a nice Christmas one from 2009