Library of Congress

The Library of Congress is situated one block away from the Capitol and is of the largest libraries in the world by volume containing documentation. The congress offers guided tours of the library in which they explain its history, but it´s easy to go inside yourself only to walk around and see the building from the inside, which is really worth it. I'm not sure if it was a temporary exhibition or permanent, but when I went they were doing a re-constitution of the personal library of Thomas Jefferson, the 3rd president of the USA.