The University of Regina buildings on its main campus are arranged such that there is a very large open area in the shape of a large ellipse in the middle of them. There are connecting walkways between every building.
This arrangement is idea for Regina. In the winter, it can get very cold here, and it is possible to go anywhere on the main campus wearing shorts and a tank top (as some students living on campus seem to do) even when the temperature is -40 outside.
At one point the connecting walkway is a tunnel. This gap between the buildings allows vehicles and people to enter the inner court/ellipse for lawn care, maintenance, gardening, etc.
It also allows animals to enter.
One evening, returning to my apartment in one of the residence halls, I saw what looked like large birds walking across the wide open space. I couldn't get my camera out quickly enough before they disappeared, but they weren't birds at all -- they were rabbits slowly hopping along. I have seen LOTS of rabbits here, both in this inner sanctum and throughout the parks. Here is just one, a young one:
I think these bunnies turn white in the winter: environmental adaptation.