Washington DC - One of the most-visited cities in the U.S., our nation's capital houses a trove of postcard-worthy monuments. The White House and the Lincoln Memorial are here, as well as a variety of walkable neighborhoods. Plus, budget-minded travelers can take advantage of free attractions, like the Smithsonian museums.
The Smithsonian is made up of 19 different museums and galleries in Washington D.C. Most are free. Interesting exhibitions online under virtual exhibitions. Anything from American history to space to horses.