Suji Mao

You have to take 10 to 15 minutes to register and then they will issue you a card that will be valid for a year. It has 6 floors, the 2nd floor being one of the biggest. Their media comes in all forms such as microfilm, newspapers, dvds, and maps. I believe there are 46 stacks located within the building, and they have a outside reading area as well.

Located of the red line at the Judiciary Square Metro Station it has some of the largest interior columns, 75 feet tall. They have a handful of tours throughout the day explaining the historical aspects of the building.