I spent Labor Day driving back from Colorado, where I had attended my cousin's wedding. Due to a meandering route on the way down, the total trip stretched to about four thousand miles. My Prius sipped fuel at an average rate of 48mpg despite climbing one mountain pass after another, so gasoline for the entire trip cost less than $250.
We are still living at the peak of civilization when two days average American wages can fuel leisure travel halfway across the country. We burned one gallon of gasoline just to go out of our way to visit PSE's Wild Horse Wind and Solar Center; there I found special parking for my Prius!