The National Aquarium, Washington, D.C., was an aquarium in Washington D.C. It was located in the Herbert C. Hoover Building (owned by the General Services Administration), which is bounded by 14th Street NW on the east, 15th Street NW on the west, Pennsylvania Avenue NW on the north, and Constitution Avenue NW on the south. It was the first free and public aquarium in the United States.
The National Aquarium in Washington, D.C. was smaller than its counterpart in Baltimore, Maryland — a facility also known as the National Aquarium, although independent until the two aquariums signed an alliance in 2003. The Washington aquarium closed on September 30, 2013, after 140 years, the longest continuously operating aquarium in the United States at the time.
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