Opened in December 1903, the Williamsburg Bridge was the longest suspension bridge in the world (until 1924, that is). Here it is in a 1907 postcard, tinged with green and blue just like the sky above and the East River waters below it.
Opening day of the bridge was filmed by Thomas Edison; it features officials in top hats, members of the press carrying big boxy cameras, a brass band, and lots of ribbons. Watch the clip here.
Fast-forward 45 years, and the bridge (as well as a lot of the old Lower East Side) is featured in the film noir The Naked City. Follow a police chase on foot and by car (and catch great glimpses of a subway on its way to Brooklyn) here.