If you ever see a patch on a building, or a crack in a fence, or a section of road that looks like it's growing black fur, take our advice and keep a safe distance. That's because it probably isn ...

It opened in the fall of 1960. Like Toronto City Hall, it is one of Canada's more obviously space-themed buildings — it looks like a UFO hovering just above the ground.

What does a grafted building look like? One example is Studio Gang’s Beloit Powerhouse, a Wisconsin power plant converted to a student centre and athletic centre.