Washington, D.C., is one of the most important capital cities in the world. It may not be as large as other capital cities, but it still packs a wallop when it comes to seeing and doing things. It is a great place to learn about the history of America, from viewing precious documents to seeing Congress in action. Dozens of museums abound in the central area. An efficient subway system makes it easy to get around the city and see most of the top tourist attractions in Washington D.C.