The visitor center is very nice and offers a lot of information about how the US Congress works, and the US Constitution. You visit a few rooms in the capitol including the Rotunda.
You may have to wait a outside as they process 20 people at a time through security. Make sure you visit their website first as there are several items you cannot bring with you into the capitol. Also, make sure you contact your local congressman so you can get the special tour.
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