How Mushrooms Help Us
Historical marker location:
201 14th St NW, The National Mall, District of Columbia
( Marker is at the intersection of Constitution Avenue Northwest (U.S. 50) and 14th Street Northwest (U.S. 1), on the right when traveling east on Constitution Avenue Northwest.)
Marker installed: 2019
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The District of Columbia itself is a far larger political entity than the city of Washington.