Other obvious comparison points off the top of my head would be Venice (~400 bridges, much smaller than Pittsburgh if you count the island city rather than the

Other obvious comparison points off the top of my head would be Venice (~400 bridges, much smaller than Pittsburgh if you count the island city rather than the broader region), Amsterdam (bigger, but has 1200 bridges apparently) and Birmingham UK (no total for bridges found with a quick Google but there's 100 miles of canal and a lot of elevated urban motorway and railway). But the great thing about being the place with the 'most bridges in the world' is that if you've got an impressive number of bridges, who's counting?