Arlington Cemetery
Arlington National Cemetery: u.s.s. Maine Memorial
This site from the Arlington National Cemetery contains a memorial to the U.S.S. Maine, a ship that was sunk during the Spanish-American War. Includes some brief text, then a lot of pictures, and then some in-depth text.
US National Archives
Nara: Panoramic Photography Exhibit
View 21 panoramic photos from the National Archives collection that feature images of natural disaster sites, major construction projects, military units, and the like.