Portal:National Register of Historic Places/Did you know/4

...that when builders told Lou Henry Hoover, who designed her own house (pictured), that some of her architectural ideas weren't done, she replied, "Well, it's time someone did"?
...that the F-111 fighter, the B-1 bomber, the Space Shuttle, and the Boeing fleet of commercial airliners were all tested at the Unitary Plan Wind Tunnel?
...that the Benicia Arsenal, in Benicia, California, was once home to the short-lived U.S. Camel Corps?
...that Room 307, Gilman Hall on the campus of the University of California, Berkeley, where the element plutonium was discovered, is a United States National Historic Landmark?
...that the Alameda Works Shipyard in Alameda, California, was one of the largest and best equipped shipyards in the United States?