Which isn't actually a bridge its a raised walk way that has part of it expanded out over the Thomistoma,so that you can view them through the glass in the floor!Crocodiles of the World (a small UK zoo focussed mainly on crocodilians) has a bridge with two sections of glass floor over their tomistoma exhibit.
Did all pulled down for being unsafe!South Lakes has a heck of a lot of bridges (or walk-ways) going through their animal exhibits such as the spectacled bear/tapir enclosure.