Congressional Cemetery (1801 E Street S.E.; phone: +1 202 543 0539)

This is one of the least known but most historically significant cemeteries in the United States. Presidents John Quincy Adams, William Henry Harrison, and Zachary Taylor were temporarily interred in holding vaults here while waiting to be moved to their final resting places. Among those buried here: John Philip Sousa, the prolific composer and leader of the Marine Corps Band; Matthew Brady, the Civil War photographer; and Belva Lockwood, the first woman ever nominated for President. Although neither she nor any other woman could vote in 1884, her candidacy for the National Equal Rights party garnered 4,000 votes.