What this title is referring to is this, if you can’t afford to go to Europe, there is so much history in your own country.
The US itself has filled of history, but so are other parts of the world. You don’t need to step outside you country to travel. I have been all over the US.
I can tell you the number of places I have been. I have been to (Florida 3x, Georgia, Wisconsin, California, Colorado). My point is to explore your own surroundings. Find out what can.