When you’re planning Two killed a trip, size matters. Take, for instance, the idea of planning a visit to the United States, or Canada, or Russia. No one without an unlimited amount of time would make a general statement like, “I’m going on a trip to the United States” without being more specific about where in the U.S. they’re going. Why? Because it’s a big place, and it’s inconceivable that someone could visit the whole country in the space of a normal vacation.