One of the reasons I have so many photos of Ottawa City Hall, aside from being there a lot on community association business, is that it has lots of interesting architectural features.
Take, for example, the second floor connection between the main building and the Heritage building. It looks great at night (this photo is from before they redid the floors in 2009):
It's also arched to mimic the windows on the heritage building:
But a detail I didn't notice until this year was the extra two little pieces of metal to turn this semi-circular vent grill into two pointed arches: