The National Cathedral is truly impressive. It is huge and has a lot to look at and explore.
It is interesting because in addition to religious subjects, American history is also represented in the architecture of the Cathedral. There are stained glass windows of Robert E. Lee, Stonewall Jackson, and Lewis and Clark. It is also the burial place of Woodrow Wilson.
Make sure to walk all the way around the Cathedral to see all the different arichitecual elements. Also stop by the Bishop's garden.
If you are light on time I would suggest just picking up a pamphlet and doing a self guided tour. If you have more time I would sugesst taking one of the guided tours.
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