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U.S. Botanic Garden Located at the base of the U.S. Capitol Building at the eastern end of the National Mall, the USBG includes the Conservatory, (click here to see what’s blooming in the Conservatory); the National Garden with its prominent rose and regional collections; and the stunning two-acre Bartholdi Park.
The Conservatory and National Garden are open daily 10-5 all year long. Bartholdi Park never closes. Admission is FREE.