As the central place for the United States Government, Washington, D.C., offers a large selection of tourist attractions cantered around the country's history. The National Smithsonian offers copious free attractions that are edifying and entertaining. Washington, D.C. attracts a lot of tourists for its Cherry Blossom festival in early spring, as well as all through the summer months.Today Washington is more than just the political hub of the United States. The city offers visitors a large number of imposing museums, memorials and monuments.The WashingtonMonument is a 555ft/169m tall obelisk constructed between 1848 and 1884 in honour of the first President of the United States, George Washington. It is the tallest free footingstonework structure in the world.