And the No. 1 tourist attraction in the U.S. is Gettysburg National Park in Gettysburg, Pennsylvania, which sees well over 1 million visitors each year. Several states were represented on the list this year, but six of the attractions are in Washington, D.C.
To determine these awards, TripAdvisor looked at millions of traveller reviews and then created an algorithm that considered the quantity and quality of reviews for each attraction over a 12-month period.
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