It's hard not to feel a little in awe of the big three documents in the National Archives: the Declaration of Independence, the Constitution and the Bill of Rights, plus one of four copies of the Magna Carta. Taken together, it becomes clear just how radical the American experiment was for its time. The Public Vaults, a bare scratching of archival bric-a-brac, make a flashy rejoinder to the main exhibit.
In spring and summer, reserve tickets in advance on the website for $1.50 each. This lets you go through the fast-track entrance on Constitution Ave and avoid a lengthy queue.