The pink and turquoise just don't belong there. Take those away and it's not that bad.

No disrespect for my neighbors to the north, but not a few Canadian tartans are potential candidates for this title. Look at these:

Yukon


Syndey, Nova Scotia


Ottawa

And try looking through some of the various tartans for Quebec cities sometime...!

Of course, there are some truly attractive Canadian tartans, as well. Maple Leaf, Nova Scotia, PEI, Manitoba, Geulph, Kincardine (Ontario), etc. And to be fair, there are some hideous tartans for American states. Anyone from Ohio?