The National Archives Museum houses the original copies of the most consequential documents in all American History:
The are collectively known as the Charters of Freedom. Located north of the National Mall in Federal Triangle, the museum is open every day except Thanksgiving Day and Christmas Day. Admission is free. Reservations are not required, but are suggested during peak tourism seasons. Both self-guided and guided tours are available for groups or individuals. Check here for all the details. There are other permanent and temporary exhibits on display at the museum related to American history.
Note that photography is not allowed in the exhibition areas of the museum due to the delicate condition of the documents.
If you are in Washington, DC, pay homage to the documents that enshrine our freedoms.
Learn more about the Charters of Freedom here.