If your trip to Hannibal is all booked but your itinerary is looking a bit empty, we can give you a helping hand.Not far from the heart of the city, Jim's Journey: The Huck Finn Freedom Center is one sight to consider putting on your to-do list. If you still have space on that travel schedule, Mark Twain Boyhood Home and Museum and Rockcliffe Mansion will keep you amused as well.