No matter how many times you go to a country like England or Japan, it’s still a little shock to get off a plane and see people driving on the left side of the road. That is, if you’re from the roughly 75 percent of countries that drive on the right side of the road. Wrong in this case is relative, depending on where you’re from.

There are a lot of differences in how individual countries do things, of course. The metric system might be the biggest—the United States is largely on its own in measuring with feet and inches. Currencies and exchange rates are certainly country-specific as well, not to mention languages and customs. But all of those things go