Photo by myself from Brooklyn Bridge Beach, in DUMBO.
One of the great things about Manhattan is that it's on an island. There are bridges and tunnels that connect it to Brooklyn and New Jersey. Once you're on the other side of the water, you can look back and see where you were.
The Brooklyn Bridge is by far the most recognizable bridge we have. It's clad in stone, and, completed in 1883, is one of the oldest suspension bridges in the United States.
Walking across the bridge to Brooklyn is worth doing, if you are visiting the city. The pedestrian walkway is suspended above the level of cars, so you get an unobstructed view of the water.
Fortunately, Brooklyn is east of New York; from there you can see the sunset against the Manhattan skyline.
Related posts: On Rain and the Brooklyn Bridge, The View from Brooklyn Bridge Beach and The City in Silhouette.