- HowStuffWorks.com. <https://history.howstuffworks.com/american-history/what-state-is-washington-dc-in.htm> 21 July 2024.
- Discover Washington DC and experience everything this city has to offer. Make visiting Washington DC a breeze and see all the sights with Big Bus Tours.
- Things to Do in Washington DC, District of Columbia: See Tripadvisor's 872,036 traveller reviews and photos of Washington DC tourist attractions.
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- Fogle, Jeanne Mason. "Washington, D.C.". Encyclopedia Britannica , 22 Jul. 2024, https://www.britannica.com/place/Washington-DC.
- Washington DC Tourism: Tripadvisor has 872,160 reviews of Washington DC Hotels, Attractions, and Restaurants making it your best Washington DC resource.
- downtown Washington, DC street map. Washington, D.C. is located along the Potomac River, between southern Maryland and northern Virginia.
- Capital: Washington, D.C., is a capital—of the United States of America! Biggest City: There are no cities within Washington, D.C. Abbreviation: DC.
- Washington DC's guide to theater, restaurants, bars, movies, shopping, events, activities, things to do, music, clubs, dance & nightlife.
- Washington, DC. Officially established in 1965, National Mall and Memorial Parks actually protects some of the older parkland in the National Park System.