out of bridges that i've seen and crossed in person:
1. mackinac bridge, michigan
2. firth of forth rail bridge, scotland
3. golden gate bridge, san francisco
4. brooklyn bridge, new york
5. ponte vecchio, florence
HM: tower bridge, london
here's a pic of Mighty Mac, my sentimental favorite. at over 5 miles in total length, this is the longest bridge in the great lakes region and was the longest suspension bridge in the world measured between anchorages when completed in 1957.
source: me