If your trip to Washington is all locked in but your itinerary is looking a bit empty, let us give you a helping hand.You may need to ask the boss for an extra week off, because Washington is full of iconic attractions. First cab off the rank should be Ford's Theater and White House. Don't miss United States Capitol and Washington Monument either.Soak up the best that this place has to offer by adding Capital One Arena and Smithsonian Castle to your travel itinerary. If you have an extra day up your sleeve, drop by Supreme Court of the United States and National World War II Memorial as well.Near the city center, National Mall is one sight you might like to put on your to-do list. If you still have space on your schedule, Smithsonian National Air and Space Museum and National Museum of Natural History will keep you on the go as well.