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Columbus Circle lies at the intersection of Delaware, Louisiana and Massachusetts Avenues and E and First Streets, Northeast in Washington, D.C. Union Station and its access roads interrupt this circle on one side, forming an arc. It is located between Union Station and the grounds of the United States Capitol. The circle is ringed by flags of each of the 50 U.S. states in order of admission to the Union plus the flags of the U.S. territories and the District of Columbia.