That is the end of ceremonial Pennsylvania Avenue. The avenue continues on beyond the Old Executive Office Building. It also continues east of the Capitol. Beyond the White House and the Capitol, though, it is no longer the ceremonial avenue. It is just another major city street.
Back at your hotel, you get out one of the postcards you bought. It shows a view of the White House. You address it to a friend back home, then stop to think. What can you say about Pennsylvania Avenue. Finally, you write, "I just walked up Pennsylvania Avenue. My feet hurt. Wish you were here."