This is going to be kind of tough. I'll have to mentally trace some of the driving routes we've used going places...

Wisconsin
Ohio
Indiana
Illinois
Michigan
Pennsylvania
Kentucky
Tennesse
Georgia
Florida
South Carolina
North Carolina
Virginia
West Virginia
Maryland
Mississippi ?? (we might have traveled entirely within Tennesse to the Arkansas border)
Arkansas
Oklahoma
Kansas ?? (we might have traveled entirely within Oklahoma to the Missouri border)
Missouri
Colorado

Outside the US:
Canada (just Ontario)

Yes, that's it, I've never left the continent. At some point in my life (and I know I've mentioned this on these boards) I'd like to travel across Southern Germany sampling local cuisine. One of my German teachers in high school said that every town has their own beers and sausages. well, I don't think, but I'm not sure I ever met a sausage I didn't like.