The Taft Bridge, the largest non-reinforced concrete bridge in the world, gracefully spans the Rock Creek Valley taking Connecticut Avenue from the oldest portion of the city to the early 20th Century streetcar suburb of Woodley Park. Along with its sturdier companion, the Duke Ellington Bridge, the Taft Bridge creates one of the most beautiful spots in the world, elegantly combining nature with sensitive man-made construction.
The sunsets are spectacular from the bridge looking toward the Omni Shoreham Hotel. I used to come across this bridge late at night sometimes when I lived in Adams Morgan, and it was just dark enough to see the stars, something basically impossible in the rest of DC.
See it from the air here.