- thoughtco.com washington-dc-geography-1435747The Organic Act Officially Organized the District of Columbia. Initially, Washington, D.C. was a square and measured 10 miles (16 km) on each side.
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- nps.gov state/dc/index.htmWashington, DC. Officially established in 1965, National Mall and Memorial Parks actually protects some of the older parkland in the National Park System.
- realestate.usnews.com places/district-of-columbia…What’s it like to live in Washington, DC? To the rest of the country, Washington, D.C., is the nation's capital – and that's it.
- medium.com illumination/top-facts-about-…Now, all 555 feet and 5 and 1/8th inches honor it as the tallest obelisk on the globe. You Can Find the Oldest Fish Market in the Country in Washington DC.
- timeanddate.com worldclock/usa/washington-dcGet Washington DC's weather and area codes, time zone and DST. Explore Washington DC's sunrise and sunset, moonrise and moonset.
- turkcebilgi.com washington,_dcBu maddede Amerika Birleşik Devletlerinin başkenti Washington, DC anlatılmaktadır. ABD'nin eyaletlerinden Washington için bakınız: Washington.
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- whatstates.com what-is-washington-dc-known-for/Washington DC is known for being the nation’s capital. The city has many famous landmarks including monuments, museums, and federal government offices.