The western base of Federal Triangle between 14th and 15th streets is the home of the Department of Commerce, charged with promoting U.S. economic development and technological advancement. When it opened in 1932, it was the world's largest government office building. It's a good thing there's plenty of space, because the National Aquarium is now housed inside. Established in 1873, it's the country's oldest public aquarium, with more than 1,200 fish and other creatures—such as eels, sharks, and alligators—representing 270 species of fresh- and saltwater life. The exhibits look somewhat dated, but the easy-to-view tanks, accessible touching pool (with crabs and sea urchins), low admission fee, and lack of crowds make this a good outing with children.
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